Add custom typers for different compiling stages.
Add public property for checking custom typers.
This should have better performance, since we don't call TryCustomExpressoinTyper.
Use /out instead of /output, to make it work with all framework sdks.
Add &quot; to handle folders with spaces correctly
Convert to .net 4.0.
Merge branch 'master' of github.com:rsdn/nemerle into vs_intergation_201x