Added target for Pinny:

- Pinny will now be added to the target specified in options, instead of
  directly to body
Renamed $target to $container to describe purpose
Removed extraneous $container variable
Added some documentation around appendTo
Reordered new option
Updating version of velocity
Updating version of shade
Added unit tests for appendTo option
Merge branch 'pinny-target' of github.com:mobify/pinny into pinny-target
Updating version of velocity
Updating version of shade
Merge pull request #41 from mobify/pinny-target

Pinny - Specify target container for Pinny