Use constant instead of method.
Extract method `build_argv_from_options`
Remember `argv` everytime we run examples.
Implement “Run Again” command (⌃⌘R)
Change “Run Examples in selected …” shortcut to ⌥⇧⌘R

So we have a distinct shortcut here (⌥⌘R was shared with “Run Last Example”).
Move ⌥⌘R shortcut to “Run Again”.

“Run Again” is “Run Last Examples file” on steroids, so the shortcut belongs there.
Use attr.test.rspec scope for some commands.

This scope available since TextMate 2.0-alpha.9557. It is automatically active in projects having a `.rspec` file. So the shortcuts for “Run Again” and “Run Examples in selected …” can now be used even from non-RSpec files in such projects.
Update readme.
Update changes.
Merge pull request #90 from rspec/run-again-command

Implement “Run Again” command.