adding serialization module
adding multi class serialization helper
adapting parent version to 0.7-SNAPSHOT
serialization: fixing wrong generic types
adding javadoc for MultiClassSerializationHelper
serialization: adding tests
serialization: adding cause to exception
removing dependency versions in submodule, adding submodule name and relativ path to parent project
MutliClassSerializationHelper: extending javadoc comment for class
MultiClassSerializationHelper: fixing warnings and comments
Merge pull request #57 from TobiasMende/develop

Adding serialization module