add options -u for initial upper bound and -s for static variable ordering ; print depth information in verbose mode

add options: -v1 to add verbosity, -o FileName to add ordering, -nl to remove the search without learning, -ln to remove the learning search.

Revert "Attempt to guide CPLEX to get better dual solution. Modify the procedure applied on the learned constraints to remove NC and BP removed values"

This reverts commit d558c0d0.

Attempt to guide CPLEX to get better dual solution. Modify the procedure applied on the learned constraints to remove NC and BP removed values