Add snippets for expect, expect with block and change.
Merge pull request #51 from c42engineering/master

Snippets for expect, expect with block and change.
Add syntax highlighting for steak keywords (feature, scenario).
Add snippet for specify.
Simplify snippets (it, desc, con), add source.ruby.rails.spec scope. Delete unused variants.
Customize run commands (names, keybindings, scopes, zeus).

They now have better names and are available in source.ruby.rails.spec scope, too.

New Keybindings: Cmd-Alt-R = "Run Again", Cmd-Shift-Alt-R = "Run Selected Files" (available in ALL scopes).

"Run Again" does a real rerun of the last run - whether it was a single context, a single file, or multiple files.

All run commands try to use "zeus" if available and fall back to "bundle exec" else.
Make let snippet available in source.ruby.rails.spec scope.
Fix running specs twice if zeus is available but some specs fail.