Improving english translations for install procedure

htdocs/langs/en_US/install.lang

 # Dolibarr language file - en_US - install
 CHARSET=ISO-8859-1
-InstallEasy=We tried to make Dolibarr setup as easy as possible. Just follow instructions step by step.
-MiscellanousChecks=Prerequisites checks
-DolibarrWelcome=Welcome on Dolibarr
+InstallEasy=We tried to make the Dolibarr setup as easy as possible. Just follow the instructions step by step.
+MiscellanousChecks=Prerequisites check
+DolibarrWelcome=Welcome to Dolibarr
 ConfFileExists=Configuration file <b>%s</b> exists.
 ConfFileDoesNotExists=Configuration file <b>%s</b> does not exist !
 ConfFileDoesNotExistsAndCouldNotBeCreated=Configuration file <b>%s</b> does not exist and could not be created !
@@ -11,7 +11,7 @@ ConfFileIsNotWritable=Configuration file <b>%s</b> is not writable. Check permis
 ConfFileIsWritable=Configuration file <b>%s</b> is writable.
 PHPSupportSessions=This PHP supports sessions.
 PHPSupportPOSTGETOk=This PHP supports variables POST and GET.
-PHPSupportPOSTGETKo=It's possible this PHP does not support variables POST and/or GET. Check your parameter <b>variables_order</b> in php.ini.
+PHPSupportPOSTGETKo=It's possible your PHP setup does not support variables POST and/or GET. Check your parameter <b>variables_order</b> in php.ini.
 PHPSupportGD=This PHP support GD graphical functions.
 PHPMemoryOK=Your PHP max session memory is set to <b>%s</b>. This should be enough.
 PHPMemoryTooLow=Your PHP max session memory is set to <b>%s</b> bytes. This should be too low. Change your <b>php.ini</b> to set <b>memory_limit</b> parameter to at least <b>%s</b> bytes.
@@ -55,10 +55,10 @@ DatabaseSuperUserAccess=Database - Superuser access
 CheckToCreateDatabase=Check box if database does not exist and must be created.<br>In this case, you must fill the login/password for superuser account at the bottom of this page.
 CheckToCreateUser=Check box if login does not exist and must be created.<br>In this case, you must fill the login/password for superuser account at the bottom of this page.
 Experimental=(experimental, non operationnal)
-DatabaseRootLoginDescription=Login for the user allowed to create new databases or new users, useless if your database and your database login already exists (like when you're hosted by a web hosting provider).
-KeepEmptyIfNoPassword=Keep empty if user has no password (avoid this)
+DatabaseRootLoginDescription=Login of the user allowed to create new databases or new users, useless if your database and your database login already exists (like when you're hosted by a web hosting provider).
+KeepEmptyIfNoPassword=Leave empty if user has no password (avoid this)
 SaveConfigurationFile=Save values
-ConfigurationSaving=Configuration file saving
+ConfigurationSaving=Saving configuration file
 ServerConnection=Server connection
 DatabaseConnection=Database connection
 DatabaseCreation=Database creation
@@ -75,40 +75,40 @@ PleaseTypePassword=Please type a password, empty passwords are not allowed !
 PleaseTypeALogin=Please type a login !
 PasswordsMismatch=Passwords differs, please try again !
 SetupEnd=End of setup
-SystemIsInstalled=Your system is now installed.
+SystemIsInstalled=This installation is complete.
 SystemIsUpgraded=Dolibarr has been upgraded successfully.
-YouNeedToPersonalizeSetup=Now you must configure Dolibarr to match your needs (Look choice, functionnalities, ...). For this, click on the following link:
+YouNeedToPersonalizeSetup=You need to configure Dolibarr to match your needs (appearance, features, ...). To do this, please follow the link below:
 AdminLoginCreatedSuccessfuly=Dolibarr administrator login '<b>%s</b>' created successfuly.
 GoToSetupArea=Go to Dolibarr (setup area)
 Examples=Examples
 WithNoSlashAtTheEnd=Without the slash "/" at the end
-DirectoryRecommendation=It is recommanded to put this directry out of directory for web pages.
+DirectoryRecommendation=It is recommended you put this directry out of the web pages directory.
 LoginAlreadyExists=Already exists
 DolibarrAdminLogin=Dolibarr admin login
 FailedToCreateAdminLogin=Failed to create Dolibarr administator account.
 AdminLoginAlreadyExists=Dolibarr administrator account '<b>%s</b>' already exists.
-WarningRemoveInstallDir=Warning, for security reasons, once install or upgrade is finished, you have to remove the <b>install<b> directory or to put inside a file called <b>install.lock</b>.
-ThisPHPDoesNotSupportTypeBase=This PHP system does not support interfaces to access database type %s
+WarningRemoveInstallDir=Warning, for security reasons, once the install or upgrade is complete, you should remove the <b>install<b> directory or rename it to <b>install.lock</b> in order to avoid its malicious use.
+ThisPHPDoesNotSupportTypeBase=This PHP system does not support any interface to access database type %s
 FunctionNotAvailableInThisPHP=Not available on this PHP
 MigrateScript=Migrate script
-ChoosedMigrateScript=Choosed migrate script
+ChoosedMigrateScript=Chosen migrate script
 DataMigration=Data migration
 DatabaseMigration=Structure database migration
 ProcessMigrateScript=Script processing
 ChooseYourSetupMode=Choose your setup mode and click "Start"...
 FreshInstall=Fresh install
-FreshInstallDesc=Use this mode if this is your first install. If not, this mode can repair a not completed previous install, but if you want to upgrade your version, choose "Upgrade" mode.
+FreshInstallDesc=Use this mode if this is your first install. If not, this mode can repair a previous incomplete install, but if you want to upgrade your version, choose "Upgrade" mode.
 Upgrade=Upgrade
-UpgradeDesc=Use this mode if you had replaced old Dolibarr files with files of a new version. This will upgrade your database and data.
+UpgradeDesc=Use this mode if you have replaced old Dolibarr files with files from a newer version. This will upgrade your database and data.
 Start=Start
 InstallNotAllowed=Setup not allowed by <b>conf.php</b> permissions
 NotAvailable=Not available
 YouMustCreateWithPermission=You must create file %s and set write permissions on it for web server during install process.
-CorrectProblemAndReloadPage=Correct problem and press F5 to reload page.
+CorrectProblemAndReloadPage=Please fix the problem and press F5 to reload page.
 AlreadyDone=Already migrated
 DatabaseVersion=Database version
 ServerVersion=Database server version
-YouMustCreateItAndAllowServerToWrite=You must create this directory and grant web server to write into.
+YouMustCreateItAndAllowServerToWrite=You must create this directory and allow for the web server to write into it.
 CharsetChoice=Character set choice
 CharacterSetClient=Character set used for generated HTML web pages
 CharacterSetClientComment=Choose character set for web display.<br/> Default proposed character set is the one of your database.