Merge pull request #105 from djarecka/master

changes in blitz.hpp and python plotting files
fixing 3d tot formulae
wip on boundary conditions for the "scalars on edges" grid
Merge pull request #106 from mwarusz/master

wip on new grid
adding an assert in open_1d + some comments
missing include + indentation changes in bcond.hpp
adding output svg file for paper_example_2
updated plot.py for err_isolines test; svg plots into repo
updated txt tilfe with output from test err_isolines
updating tests to the new domain geometry interpretation (+some better error reporting in tests)
fixing hook_ante_loop in mpdata_rhs_vip_common
adding a missing include in arakawa_c.hpp
cleaning up vctr_alng exchanges
fixing dfl option for G=1
changing paths of input files
chaniging mpdata options and vip_eps in spreading_drop in 1D and 2D