Updated methods for handling LSL script errors, deprecated, and not implemented
Updated ShoutError() calls to use new LSL error methods
Updated "not implemented" LSL errors to use NotImplemented()
Updated "deprecated" LSL errors to use Deprecrated()
Replaced LSLError() calls with calls to Error()
Replaced llSay()ing LSL errors with calls Error()
Replaced throwing exceptions with calls to Error()
Made error messages more consistent