Add ErrorHelper to bindings.

Wrap new generated binding calls with using ErrorHelper. Sets up a try
to call the method in and a finally block to call Dispose on the
ErrorHelper. Currently hardcoded to only work for the graphics modules.
[Rewrite] Fixed exit from try-finally block
[Build] Fixed ErrorHelper local variable

We need to emit a ldloca instruction before constructing the
ErrorHelper instance, in order to reference it in the finally
block below.
[Build] Added -debug to Rewrite commandline parameters
Merge branch 'calli' into develop