Issue #327 Added code to ensure that at least one release is present
when invoking RtReleasesITCase#canFetchAllReleases
Issue #511 Added MkReleaseAssets fields and annotations,
MkReleaseAssetsTest class
Issue #511 Implemented MkReleaseAssets methods and unit tests
Issue #511 Implemented some tests for MkReleaseAsset
Merge pull request #519 from carlosmiranda/511

#519: pull request Isuse #511 Implemented MkReleaseAssets
Merge pull request #518 from carlosmiranda/327

#518: pull request Issue #327 Added code to ensure that at least one release is present