Minor: Simplify, improve, clean

Changed

• Rescue within an event to ensure that the timing is stopped in the event of a failure
• Remove old hooks and add new block management
• Remove and old or unrequired code
• Improved method naming
• Moved history and license into root

Added

• Readme completed with hooks, stopwatches and now functionality
• 100% coverage rspec tests
• Complete commenting of code
• Added Rakefile and Tasks

Fixed

• Updated Stopwatch
• Updated Stopwatch Specs