Issue #262 RtRepos is able to remove a repository
Merge pull request #337 from longtimeago/262

#337: pull request Issue #262 RtRepos is able to remove a repository
Merge branch 'master' of github.com:aistomin/jcabi-github into 229
Issue 229. RtReposITCase.create test repository will be deleted after test complete.
RtRepos: made both "create" and "remove" logic works.