Merge pull request #21 from TeamWhat/JSON-sending

Json sending
Added ApplicationDataCollector
Added application data table, finished ApplicationDataCollector
Add test for ApplicationDataCollector
Fix JSONPackager test
Fix JSONPackager test
Make application data collection work with the backend
Merge pull request #20 from TeamWhat/app_data

App data
Add TextDataCollector and a test for it
Fix JSONPackager test
Add doc, docx, pdf, odt and rtf for text data collector
Merge pull request #22 from TeamWhat/text_collector

Text collector
Deleted most demo activities and classes
Removed unnecessary tests and fixed mock cursor error in MediaDataCollectorTest
Merge branch 'production-staging' of github.com:TeamWhat/what-stored-in-a-mobile-device-android into production-staging