Merge pull request #3 from thenickperson/master

Move Rack server setup into a new Jobim::Server module
Cutting version 0.4.5
Adding gem-version badge to README
Adding actual error handling to cli.run!
 - now can tell the difference between user and program error
 - spits out help only for bad flags
Cutting version 0.4.6.
Changing lambda syntax so RBX works
Cutting v0.4.7
Adding parens to rewrite rule
 - Ensures the block gets passed to lambda and not to rewrite
Cutting v0.4.8