added keyboard shortcut of ctrl+shift+m+x to run mxunit tests
updated readme to include installation instructions
Merge pull request #1 from finalcut/master

Add ability to optionally select a specific test to run.
Updated read to reflect new features submitted by @finalcut
Merge pull request #2 from finalcut/keyboard_shortcut

added keyboard shortcut of ctrl+shift+m+x to run mxunit tests
merged changes from master to make sure there are no conflicts
merged cleaned up code; as I had started this branch before the cleanup obviously
Merge pull request #3 from finalcut/install_instructions

updated readme to include installation instructions