Issue #181: Added a test for RtReleases.iterate()
Issue #181: Implemented RtReleases.iterate(), minor fixes
Issue #181: Added a stub of test for MkReleases.iterate()
Issue #181: Added an integration test for RtReleases.iterate()
Merge branch 'master' into issue181

Conflicts:
	src/main/java/com/jcabi/github/RtReleases.java
	src/test/java/com/jcabi/github/RtReleasesTest.java
Issue #181: Minor fixes
Issue #181: Added a test for MkReleases.iterate()
Issue #181: Implemented MkReleases.iterate()
Merge pull request #209 from asinyagin/issue181

#209: pull request Issue #181