-Add live data loading to main interface
-Change count threashold to be relative 1%, not absolute 100 counts
Fix some issues with xmldata rereading
-round wavelength when selecting normalization dataset
-don't detect new datasets with only one 'entry' in nexus file as old
one
Some fixes for usage of other detector
-Generalize detector pixel sizes
-Fix some exceptions in specific cases of calculations
-Autoselect direct beams from closes slit positions
-Fix naminc convention for tof-x files in LiveData readout
-Add sample database functionality, intended for automatic reflectivity
generation. Add a dialog to search samples by user defined filters. 
-Automatic reflectivity generation not yet available.