EntityNameTooLongException created.
normalize function which manages the multiple spaces crezated.
Merge branch 'teyssier-fichiers'

Conflicts:
	common/entities/Entity.php
Fixed logic
Channel.php modified
Merge remote branch 'origin/guimier' into teyssier-fichiers

Conflicts:
	common/entities/channels/Channel.php
Merge and date modified
Fixed spelling errors
Merge remote branch 'origin/guimier' into teyssier-fichiers