hub 1.6.0

`hub` is a command line utility which adds GitHub knowledge to `git`. It can used on its own or as a `git` wrapper. Normal: $ hub clone rtomayko/tilt Expands to: $ git clone git://github.com/rtomayko/tilt.git Wrapping `git`: $ git clone rack/rack Expands to: $ git clone git://github.com/rack/rack.git