updated galaxy form to include dropdown for HSB and LSB galaxy types -- will add more in future if necessary. also updated specs
added numeric validations on galaxy and measurements float attributes
fixed json return of galaxy measurements
fixed measurements#show. @galaxy was somehow set after finding measurements
fixed galaxy table. removed vcr, r_0, and sigma0 - these will be calculated in ROCM. need to clean up migrations later
renamed measurements table to velocities and updated references - hopefully all of them!
removed columns from velocities we didnt need. also fixed the table output for galaxy's number of stars
fixed velocities columns and removed the unncesseary columns from views, model, and controller
wipit