add default definitions for LPs
add lp gurobi wrapper/solver
update gurobi caller
update LPCplex - more parameters
 add changes for LPCPLEX in caller
add LPGUROBI to commandlinetool
enable lpgurobi-test
add lpgurobi-test
Merge pull request #325 from joergkappes/master

LP/ILP update (CPlex and Gurobi)