implemented definitions for ion modes in python.h and relevant routines for ionization
Switched TE and TR numbers, also corrected one omission
corrected error in help message
changed fractional error back to 0.03 (mistakenly set to 1e-12)
Added balmer decrement test to travis yml
Fixed some conflicts
Merge branch 'Higginbottom-dev' into dev
fixed version.h conflict
slight cleanup
Merge branch 'dev' of https://github.com/agnwinds/python into ion_modes
Set LTE mode to use T_r, and used definitions in levels.c and partition.c
Commented out errors so fiducial model can run. Issue still open, see #91
Merge pull request #87 from jhmatthews/ion_modes

# definitions, rather than numbers, for ion and nebular modes
Fix for memory leak - #92
Merge branch 'dev' of https://github.com/agnwinds/python into dev
Fixed free(commbuffer)- needed closing ;
Dynamic allocation of NION sized arrays in plasma structure