ticket #620 - Contents#remove() very hard to use
Issue #617 - RtReleaseAsset should be able to remove files
Merge pull request #626 from lthuangiang/620

#626: pull request ticket #620 - Contents#remove() very hard to use
Merge pull request #638 from carlos-a-crespo/issue-617

Issue #617 - RtReleaseAsset should be able to remove files
Merge pull request #65 from jcabi/master

merge to my repo