Error Handling Files

Source files for error handling.

Files
file	mxError.hpp
	The mxlib error reporting system.
file	mxException.hpp
	Declares and defines the mxlib exception class.
file	error_t.hpp
	The mxlib error_t type and utilities.
file	mxErrorOld.hpp
	Old version. Deprecated. Declares and defines the mxlib error reporting system.
file	mxError.cpp
	Function definitions for the mxlib error reporting system.