Added Gist 'commit' syntax

Gists are treated just like repositories (they really *are* repositories), so you can push changes back to a Gist from the command line.
This means you also can modify and push updates to Gists:
Added Gist 'push' syntax - needs proper translation

Gists are treated just like repositories (they really *are* repositories), so you can push changes back to a Gist from the command line.
Added Gists 'push' syntax - this requires proper translation

Gists are treated just like repositories (they really *are* repositories), so you can push changes back to a Gist from the command line.
Added Gists 'push' syntax - this requires proper translation

Gists are treated just like repositories (they really *are* repositories), so you can push changes back to a Gist from the command line.
Merge pull request #73 from ParkinT/doc_updates

Added syntax for git 'push' of changes to a Gist