Run soffice in background

NEW odt generation possible for contract, product, user and user groups

NEW : Add project to social contributions

By default www-data run as system user on /root directory, to prevent some error about right user we :
* move first to /tmp directory
* set /tmp as home www-data user

If needed admin sys can update *$home_java* to a valide www-data directory

FIX html tag

It's better to split command call in two part. Set command to execute with binary path and execute after in background

Fix incorrect html tag not closed

Conflicts:
	htdocs/core/class/html.form.class.php
	htdocs/langs/en_US/loan.lang
	htdocs/theme/eldy/style.css.php
	htdocs/theme/md/style.css.php

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More information on project list of thirdparty.