Fixed project dependencies and CI configuration
Change log for 3.0.3
Improved Travis configuration
#69 YamlDefinitionFileLoader crashes if YAML file is empty (test + fix)
Change log for 3.0.4
#70 Definition conflict when setting a value for a class name
Change log for 3.0.5
Merge remote-tracking branch 'origin/master' into 3.1

Conflicts:
	composer.json