Store the name for the lp file in the constraint
Store index instead of string
Moved naming responsibility to constraint
Add block class that can contain constraints
Block creation function
Comment
Create new block
Add constraint to current block if given
Block can returns its .dec representation
Write a string representation of decomposition given in model
Can save a dec representation
Include 'presolved' parameter
Log scip and gcg results
Merge branch 'feature/gcg_interface' into develop