First iteration at parameter descriptors
More changes to have parameter descriptors
Fix problems with conversion
Fix monochromator magic

Keep it simple ...
More fixes, down to 3 errors, 16 failures
Allow overriding of parameter soft limits
Revert "Allow overriding of parameter soft limits"

This reverts commit 5d5c8f6dd58c89f70e8273f5b3bd69fac83e1624.