Removing wxNET as it's Dead

The wxNET description was duplicated. One here and another one in Dead Toolkits page. As the Project is still dead (no updates since 2011), it shouldn't be here.
Merge pull request #65 from thiagoabreu/patch-1

Removing wxNET as it's Dead
Spliting the GUI Toolkits page in two

One for the Toolkit list and other for the Guide to choose a toolkit.
Fixing a URL
Merge http://github.com/mono/website into gh-pages

Conflicts:
	docs/gui/gui-toolkits.md
Applying pull request's corrections
Merge pull request #66 from thiagoabreu/gh-pages

Gui Toolkits
Fixed a few style inconsistencies
Add more
Added note about redirect workaround to README
Updated Gtk# for .net framework page and added link to Gtk# installer to download page
Updating and cleaning the GUI Toolkits

- Added Xwt
- Added the new QtSharp
- Moving Qyoto and Qt4Net to Dead Toolkits as they are... well... dead
Fixed typo
Removing bad example
Better example
Fixing grammar errors
More fixes to gui pages
Merge pull request #67 from thiagoabreu/gh-pages

Updating and cleaning the GUI Toolkits
Fixed invalid link
Switch off hard_wrap for kramdown's GFM Markdown and fix the few cases where the html output would've changed