Fix trailing comma bug affecting wiki page retrieval.
Merge pull request #36 from jhnstrk/master

Fix trailing comma bug affecting wiki page retrieval.
Added tests to ensure parameters to issue queries function as expected.
Updated some grammar and clarified issue query options.
Forgot to a word
Further clarification
Correcting `Version` model. Adding `versions` attribute into the `Project` model.
Merge remote-tracking branch 'upstream/master'