Adding instrument column in methods list.
Added columns for Retention period, Matrix, Default Container.

Problems in Sample Points's column implementation: KeyError: 'SamplePoints'
Merge branch 'develop' of http://github.com/bikalabs/Bika-LIMS into feature/1214
Fix #1214 More columns
Firts column implementation
QCNumber column added.
Fix #1199 From the 'How did we overlook this' dept. Worksheet totals in WS lists
Merge branch 'feature/1214' into develop
Merge branch 'feature/1199' into develop