Fixed email bug in users import. Closes #192
Merge remote-tracking branch 'upstream/master' into user-csv-bug-fix
Added explanation for users import
Merge remote-tracking branch 'upstream/master' into user-csv-bug-fix
Closes #190
Fixed users import test
Merge remote-tracking branch 'upstream/master' into user-csv-bug-fix

Conflicts:
	src/core/Claroline/CoreBundle/Resources/translations/platform.en.yml
	src/core/Claroline/CoreBundle/Resources/translations/platform.fr.yml
checkstyle
Merge pull request #203 from kitan1982/user-csv-bug-fix

User csv bug fix