Update OpenSimulator to use .NET 4.0

This allows region modules to register script functions that have more than a couple of arguments.
It also allows OpenSimulator code to use the feature and syntax additions that came with .NET 4.0
Windows users will need to install Microsoft .NET 4 framework if they have not done so already.
Windows C# Express 2010 also becomes the minimum IDE for build, so runprebuild.bat now generates a 2010 solution and runprebuild2010.bat goes away
Official minimum mono version becomes 2.10.8.1.  OpenSimulator will probably work with 2.8 later but this is not guaranteed.

1 files changed, 3 insertions, 1 deletions

diff --git a/README.md b/README.md
index 6309385..fb1e921 100644
--- a/README.md
+++ b/README.md
@@ -19,6 +19,8 @@ need to build OpenSim before running it.
 
 You will need .NET Framework 3.5 installed to run OpenSimulator.
 
+You will need .NET 4.0 installed to run OpenSimulator.
+
 We recommend that you run OpenSim from a command prompt on Windows in order
 to capture any errors.
 
@@ -31,7 +33,7 @@ Now see the "Configuring OpenSim" section
 
 # Running OpenSim on Linux
 
-You will need Mono >= 2.4.3 to run OpenSim.  On some Linux distributions you
+You will need Mono >= 2.10.8.1 to run OpenSimulator.  On some Linux distributions you
 may need to install additional packages.  See http://opensimulator.org/wiki/Dependencies
 for more information.