Add more documentation to README.md
Add layout file description
Add support for filters

In your layout files, you can now use the "filters" key in window items,
like so:

    windows:
      - name: my-new-window
        root: ~/Code/foo
        filters:
          before: "sudo bash"
          after:
            - "echo 'Let’s use use ruby-1.9.2 for eachs plit'"
            - "rvm use 1.9.2"
        splits:
          [splits list]
Teamocil::Layout#initialize now takes a layout, not a file
Use empty options hash by default
Add spec directory (yes, it currently sucks)
Remove unused test files
Add Gemfile and Rake tasks
Remove unused console script
Fix typo in gemspec file
Add example files
Use a more futureproof gemspec file
Clean up some code
Follow spec conventions for filenames
Improve README
Add support for `options` in a window item

For example, you could synchronize all commands sent to a window by
adding this in your window item:

    options:
      synchronize-panes: true

See the `set-window-option` section of the tmux manual (`man tmux`) for
a list of all the options you can use.
Update teamocil in Gemfile
Improve specs
Refactor the Layout class
Bump to 0.2