Resolution limits ignored? Fix!

Hi Folks,

Got an error report from Chip Lesburg, that the -i_over_sigma_limit was ignored. This was perfectly accurate, and it turns out that yes, it was ignored. Fix is to change the calls to determine_scaled_resolution in Modules/CCP4ScalerImplementation.py and Modules/XDSScaler.py to replace 2.0 and 3.0 respectively to Flags.get_i_over_sigma_limit(). Will be fixed in next version.

Yes, these Python modules are nasty code, refactoring them is a separate problem!

Graeme