added trws_base::TRWSPrototype::getFactorProperties() function
minor changes: added GM type definition to DecompositionStorage
Merge pull request #6 from opengm/RC2.1

Merge pull request #85 from homul/RC2.1
Merge branch 'RC2.1' of github.com:homul/opengm into RC2.1
Merge pull request #86 from homul/RC2.1

Rc2.1 Several service functions added to TRWSPrototype