Fix for problem with dvdy
Merge branch 'dev' of https://github.com/agnwinds/python into dev
corrected error in wind2d.c
Merge branch 'dev' of https://github.com/agnwinds/python into dev
Merge branch 'dev' of https://github.com/agnwinds/python into dev
Moved banded estimators to subroutines to avoid code duplication. Also moved j_direct/scatter and ip calculations, and create a save_photon_stats subroutine for the extra diagnostics photon tools NSH implemented
changed to w_ave
Merge pull request #71 from jhmatthews/dev

Moving estimators increments from radiation into subroutines (estimators for PPL ionization solver and IP)