Added download sound functionality, resturctured Query hierarchy [Issue
#8]
Unit tests for BinaryResponseQuery [Issue #8]
Unit tests for DownloadSound [Issue #8]
Corrected Javadoc
Added missing JavaDoc
Updated README for DownloadSound [Issue #8]
Additional unit tests for OAuth2 queries
Additional unit tests for MeQuery
Additional unit tests for error responses
Addiiotnal unit tests on SearchFilter
Additional tests for FreesoundClient
Merge branch 'develop-#8' into develop
Re-packaging of MeQuery