[minor update of SandwichFeatures]
- write resfile automatically (NOTAACFHWY for loop residues and
surface heading strand residues)
- default value of CB_b_factor_cutoff_for_electrostatic_interactions =
10,000 instead of 60 which is mentioned in http://spdbv.vital-it.ch/TheMolecularLevel/SPVTut/text/STut09aTN.html
in order to count all possible electrostatic interactions
[integration tests comment]
- should not change other than features and features_database_schema (if any)