Performance - calling scripted methods from code

*  The interface in TinInterface.h, using TinScript::ExecF() or
ObjExecF() is still supported, and uses a formatted string.
*  The new interface in registeredexecs.h (generated by the same python
script, genregclasses.py) executes about 5x times faster, as it doesn't
parse/compile/execute, but it directly finds the function and executes.
*  This new interface is as simple - instead of a formatted string, it's
templated up to 8x parameters (with auto-type conversions).