Register admin elements via annotations
Improved travis raports readability
Fixed failing tests
Used more proper function to check if directory exists
ElementFactory refactoring
Replaced ManagerBuilder with ManagerVisitor and rebased according to #113
Created ElementCollectionVisitor that allows to remove element creation logic from compiler pass
Merge pull request #112 from norzechowicz/annotations

Register admin elements via annotations
Move registering template globals from Twig Extension to Container Compiler Pass
Closes #114