#263 solved error

the create() method in MkIssues and MkReleases would give the error
"Only text() nodes or attributes are retrievable with xpath()" when
creating more than one Issue or Release. Solved it and put some tests.
Added Request field to RtContents
Issue #218: Added integration tests for RtSearch.repos(), RtSearch.issues(), and RtSearch.users()
Issue #320 Github supports gitignores() method
Issue #311 Implemented RtContents.remove()
Issue #222: Added an integration test to check RtRepo.create() failure on creation of two repos with the same name
Merge branch 'master' into 263
#263 code style fixes
Merge remote-tracking branch 'upstream/master'
#263 merged master into 263
Merge remote-tracking branch 'upstream/master'
Merge branch 'master' into 263
Merge pull request #372 from amihaiemil/263

#372: pull request #263 solved error