Added PHP5.5 to travis configuration
Merge branch 'master' of https://github.com/niels-nijens/ObjectToDatatypeBehavior
Changed Travis-CI configuration
Fixed comments in ObjectToDatatypeBehavior and ObjectToDatatypeBehaviorObjectBuilderModifier

Improvements to ObjectToDatatypeBehaviorObjectBuilderModifier::objectMethods
Changes to test schema XML
Improved toArray and toXML method templates
Implemented toArray and toXML result tests
Implemented getForeignObjects and getReferrerForeignObjects for each datatype / format
Improved / fixed existing tests, Implemented result testing for toArray and toXML
Added newlines to generated toArray and toXML methods for readability