Update powerline and CSSComb plugins.
Add editorconfig vim plugin.
Update vim plugins.
Register handlebars filetypes with ack.
Tweak vim display.

* Decrease GVim font size.
* Change colorscheme.
Add trim trailing whitespace vim function.
Update zshrc file.

* Use 'rails' oh-my-zsh plugin instead of 'rails3'
* Enable homebrew tab completion.