adds behaviour to handle module message for a module that is loading

- messages are intercepted and stored during the loading process and fired again after the loading has been finished

- message processor handling is done in DefaultModuleLoader instead of the DefaultModuleLoaderTask
adds .DS_Store to .gitignore
Merge pull request #1 from StephanPartzsch/f_handle_requests_while_loading

Adding functionality to handle module messages while the module is loading