upgraded nunit to 2.5.10 (tried 2.6.2 and 2.6.1 but they threw exceptions on cyber-dojo.com server (Ubuntu 10.04 LTS with upgraded mono)
added notes on upgrading C#(mono) and NUnit
added C# installation tests
added nunit-console info on upgrading C#-mono
removed Java-Approval erb code that refreshes the editor as it's messing up the line-numbers
It was losing the line numbers when you ran the tests. This change should make sure
they are retained.