Adding support for Callister & Gair eccentric IMRI model.
Redefined function names in LALSimInspiralHGimri.c and LALSimInspiralCGimri.c, edited Makefile.am, LALSimInspiral.c and LALSimInspiral.h to simultaneously support both waveform families.
Edited LALSimInspiralHGimri.c in preparation to prepare a patch for master.
Remvoing eccentricIMRI code (now on branch imri_development/eccentric_imri_development) in preparation for patch to master.
Further removing eccentric IMRI code.
Edited LALSimInspiralHGimri.c to fix errors when simulating retrograde orbits.