Added drop down list in surgeries#new view so Surgeons field references list of surgeons in db.
Merge branch 'mchau'

Added drop down menu to surgery#new view so Surgeons references the surgeons in the db.
Created partial for surgeries form. Updated drop down list for surgeons in surgeries#new view to show surgeon's full name. Updated surgery model to validate for surgeon_id instead of surgery_id
Merge branch 'mchau'

Created partial for surgeries form. Updated drop down list for surgeons in surgeries#new view to show surgeon's full name. Updated surgery model to validate for surgeon_id instead of surgery_id.