v0.5.8: Pair programming and global gems

- Add the `globalize` command for temporarily altering the GEM_HOME
  so that a binary from a globally-recognized gem can be executed
  in a project folder. The command `dots` is globally aliased to
  this function for safety.
- Add `dots robify` to initiate a 'compatibility layer' for pair
  programming with others. Opens the project in TextMate, and changes
  some of the more experimental features back to their original
  settings, allowing a real human to function on my setup easier.
- Remove `dots bundle` as we are no longer using Bundler to manage
  the global gemset.
- Update the project Gemfile and get bin/ out of gitignore
- Use a custom Bundler configuration for this project. In a normal
 DOTS setup, bin/ is used for binstubs, but that conflicts here.