adapted `gen_funcdefs.h` for python2.6
first add of the new and modified files - checked with 50x50x70 grid
changed makefile for paralution, dns.cpp for initializing ans stopping paralution, solve_momentum corrector to pass level_set as an argument, solve_pressure_correction_system to call the paralution DPCG solver
Merge pull request #1 from itabhiyanta/master

rohit_paralution_dpcg_addition