Modifications to clean up test environment

...ion_fwd_ctbto/control_output/grid_conc_20140919050000_001

...ion_fwd_ctbto/control_output/grid_conc_20140919060000_001

...etgrid_1species_1emission_fwd_ctbto/control_output/header

...ecies_1emission_fwd_ctbto/control_output/trajectories.txt

flexpart-testing/check/check.py

flexpart-testing/check/ctbto_cases_gfortran.lst

flexpart-testing/check/db_ctbto.lst

flexpart-testing/check/general_cases_gfortran.lst

flexpart-testing/check/list_complex_cases.lst

flexpart-testing/check/list_ctbto_cases.lst

flexpart-testing/check/list_simple_cases.lst

flexpart-testing/check/noctbto.lst

flexpart-testing/check/single_ctbto.lst

flexpart-testing/check/yesctbto.lst

flexpart_code/grib2nc4/.gitignore

flexpart_code/grib2nc4/test/.gitignore