Merge pull request #52 from jcabi/master

merge to my repo
Merge pull request #53 from jcabi/master

merge from master to one
Merge pull request #54 from jcabi/master

merge from master to my repo
Merge pull request #55 from jcabi/master

merge from master to my repo
Issue #374 - RtReleases should be able to edit release
Merge pull request #520 from lthuangiang/374

#520: pull request Issue #374 - RtReleases should be able to edit release