Implemented m1-m2 coordinates
Implemented m1-m2 coordinates system in intrinsic grids. Fixed #12 (closed)
Example runs:
S190425z: m1-m2 coordinates: https://ldas-jobs.ligo.caltech.edu/~vinaya.valsan/RapidPE/mass1mass2_coordinate_test1/S190425z_test1/20220701_gstlal_20190425_G330564/
S190828l:m1-m2 coordinates: https://ldas-jobs.ligo.caltech.edu/~vinaya.valsan/RapidPE/mass1mass2_coordinate_test1/S190828l_test1/20220701_gstlal_20190828_G348519/
S190828l:mc-eta: https://ldas-jobs.ligo.caltech.edu/~vinaya.valsan/RapidPE/mass1mass2_coordinate_test1/S190828l_test1_mceta/20220702_gstlal_20190828_G348519/