Fixes for the specific_analyses.relax_disp.api module for the relax_disp.exp_type change.
This follows from http://thread.gmane.org/gmane.science.nmr.relax.devel/4530, the thread about
supporting multiple data types such as SQ+MQ data simultaneously.
The loop_exp*() functions are now being used throughout the module. The
specific_analyses.relax_disp.checks.check_*() functions are also used to simplify the code and fix
changes to cdp.exp_type. And some auxiliary functions from specific_analyses.relax_disp.disp_data
are being used as well.
