Support to Create Gists
Remove need for NewGistFile.cs
Initialize Files

Initialize Files to reduce needless setup to create a gist.
Remove suppress attribute
Delete Gist

Add ability to delete gist with test cases.
Complete Gist API
Passing tests and fix build for MonoAndroid and MonoTouch
Fix convention tests running for gists
Merge pull request #391 from Therzok/create-gists

Fixup for #239