relax SVN archive

Converted the read() function to the new relax design.

Converted the get_specific_fn() raise_error arg to a bool.

Bug fix for the AIC model selection between two diffusion tensors system test.

The diffusion_tensor.init() fixed arg is now passed in as a bool.

Bug fix: Removed an old line of code from the write() function.

Converted the write() function to the new relax design.

Converted all class methods to module functions.

Converted the results.write() force arg to a bool.

Converted the relax_data.write() force arg to a bool.

Fixed all calls to diffusion_tensor.init().

Bug fix for the fixed arg test of the diffusion_tensor.init() user function.