init of translation auto complete
adding some util classes
Merge branch 'feature/util' into feature/support-translation
Merge branch 'forked_master' into feature/support-translation
added translation completion on twig trans function with domain filtering
translation file can have same stringId for different languages
make translation compatible with jdk1.6
moving cache handling out of the project component
removing used code
Merge branch 'feature/support-translation' into develop

Conflicts:
	src/fr/adrienbrault/idea/symfony2plugin/Symfony2InterfacesUtil.java
	src/fr/adrienbrault/idea/symfony2plugin/TwigHelper.java