Started refactoring the definition sources
Improved lazy reading of a definition file
Refactoring of the ArrayDefinitionSource, DefinitionManager, Container, ContainerBuilder
Improved code coverage reports by using @covers annotations
Fixed a bug in AnnotationDefinitionSource
Removed CombinedDefinitionSource
Fixed test
Improved exception message in container
Refactoring of DefinitionSources
Split file handling of ArrayDefinitionSource to new PHPFileDefinitionSource
Merge pull request #140 from mnapoli/DefinitionSourceRefactoring

Refactoring of the definition sources