Removal of WX dependency and introduction of Qt UI alternative

This is just the first stage. Still lots more to do since wx is throughout the code base.
The biggest offender is wxString which can be seen everywhere!

Aims of this work:
* Introduce Qt UI alternative
* Allow easy upgrade to wx 3.0 and future versions.
* Have a codebase which doesn't depend on a toolkit (C++11 does everything anyway)

So far the Qt UI just mimics the menubar and provides an OpenGL environment.

![capture](https://f.cloud.github.com/assets/61218/1637194/7e1d52c4-57de-11e3-82b9-9a85511bcb8f.PNG)

(Windows styling disabled)