relax SVN archive

Fixes for numpy version under 1.8, when striding through data.

Added warning message to auto analysis in relax disp, if numpy is below 1.8 and using numerical model.

This will make the analysis 5-6 times slower.

Replaced all matrix_exponential functions in numerical models to use the new general matrix_exponential function.

Fix for eye matrix being wrong formed.

Removed all un-used helper functions, and matrix exponential functions.

They are now condensed to the fewest possible functions.

Changed to the matrix_exponential function for NS R1rho 2site.

Made new general stride helper function and matrix_exponential function.

A profiling showed, that it was not faster to preform the index view.

Extracted the data view of the index indices numpy array in the target_function.

Added function to get the data view via striding through a higher dimensional column numpy array.