develop

Conflicts:
	htdocs/install/filelist.xml

develop

Conflicts:
	ChangeLog

Fix #3158 can't change date in invoices

supported by sqlite, so choice is hidden

NEW add hook in send mail

Fix #3183 Make sure FormOther class is included.

abstract because this break compatibility with a lot of external module
and generate FATAL errors after migration. Because PHP is not yet able
to manage try catch on FATAL error, we can't catch such error. Using
bstract on constructor is so postponed.

Fix #3166 : An accounting account can be alphanumeric (Need for EBP)