Added help page for C#
Added Linux support

Just linking to Mono’s Linux help page
Added compiling via the command line
Added additional StackOverflow links
Small note when running tests via the GUI
Added VS Express 2013 setup and screenshots
Added using NuGet to get NUnit assemblies
Image location change
Image location change 2

Figuring out how to link images in Markdown here...
Updated image locations for the site

This will break in GitHub but should show on the site.
Added some additional resources
Added more NUnit instructions on how to execute tests
Miscellaneous updates and tweaks
Removed note on changing directories

This shouldn't be needed