Merge pull request #29 from jcabi/master

merge from master to my repo
Merge pull request #30 from jcabi/master

merge to my branch
Merge pull request #31 from jcabi/master

merge from master to my branch
Issue #301 Added create() methods to PublicKeys and implemented
RtPublicKeys#create
Issue #301 Implemented MkPublicKeys#create method
Issue #142 -  implemented unit tests for RtGitignores
Issue #141 - implemented integration tests  for RtGitignores
Resolved issue #286: RtRelease should be able to delete a release.
Merge pull request #322 from hariso/master

#322: pull request Resolved issue #286: RtRelease should be able to delete a release.
Issue #284 RtGistITCase.readsAndWritesGists failing on write fixed
Merge pull request #319 from lthuangiang/141

#319: pull request  Issue #141 - implemented integration tests  for RtGitignores
Merge pull request #318 from lthuangiang/142

#318: pull request  Issue #142 -  implemented unit tests for RtGitignores
Merge pull request #317 from carlosmiranda/301

#317: pull request Issue #301 Added and implemented PublicKeys.create() method
Merge pull request #325 from longtimeago/284

#325: pull request Issue #284 RtGistITCase.readsAndWritesGists failing on write fixed