attempting to avoid code duplication in matrix schemes
commented out solve_matrix solution error
Merge branch 'matrix_test' of https://github.com/agnwinds/python into matrix_reorganise
Merge branch 'dev' of https://github.com/agnwinds/python into matrix_reorganise
Merge branch 'matrix_test' of https://github.com/agnwinds/python into matrix_reorganise
Merge branch 'dev' of https://github.com/agnwinds/python into matrix_reorganise
fixed conflict in py_plot_output.py
indenting and commenting- changed name of function
edited call to matrix_ion_populations
fixed a merge conflict in plot routine
Merge pull request #130 from jhmatthews/matrix_reorganise

Reorganise the matrix scheme