Frameless window control positioning and grunt watch

Hello! I'm new around here. I happened to stumble upon this app (I was browsing the homebrew cask issues and one of them mentioned plans to include this app on the caskroom) and noticed @avihaymenahem frameless window controls. I extended his code to support OSX layout too (positioning on the left, in x - + order).

Here are some screenshots:
![Windows](https://cloud.githubusercontent.com/assets/1285131/3224744/3f178768-f03e-11e3-961a-44090b205ebc.png)
![OSX](https://cloud.githubusercontent.com/assets/1285131/3224745/3f41b718-f03e-11e3-9204-34d6536aa135.png)

I left the HipHop logo on the right for the OSX version. If it went on the left with the window controls the search bar could be aligned with the divider of the main split view below. Idk, just a thought. It would also mean a bigger change between OSX and Windows/Linux version so I didn't do it, just the window controls.

I also added a `grunt watch` task that automatically compiles `sass` & `coffee` code when source files change.