…sertion directly into active Sublime Text 2 view.
This should provide somewhat better error messages. In case we actually reach GitHub (and not fail because of a network error), user will see the HTTP error code and contents of message field from the response. It's not perfect - ideally, we should use GitHub's response to show specific error messages (like 'duplicate filename), but that's a task for another day.
Context menu: remove "get list" command, as it's available in command palette and main menu. Added new gist view commands: rename file, change gist description, delete file, delete gist. Commands themselves are not implemented yet. Main menu: split the Gist submenu into two logical blocks - commands that are always enabled (create gist/open gist) and gist view commands.