relax SVN archive

The Grace code can now handle dictionary type data.

The Monte Carlo simulation code can now handle dictionary type data.

Converted the specific relaxation curve fitting code to use the dictionary data structures.

Switched __errors_repl() to use dictionaries rather than lists.

The execution lock is released by the interpreter in all Error situations.

Security fix - execfile() is no longer used to run relax scripts.

Instead a custom function exec_script() is being used to call runpy.run_module(). exec_script()
also locks and releases the relax execution lock before and after operation.

The status object is not being initialised on import, to allow controlled setup upon start up.

The status object is being initialised and setup before execution of the main relax class.

Fixes for the status object by renaming __init__() to setup() and calling it only once.

The object was not acting as a singleton because of the presence of __init__(). This is now fixed.

The Mf.bug_14941_local_tm_global_selection system test now prints out some status info.

This is to test the status container.