adds readmission bubbles
updates color for readmission rate
adds readmission bubbles
updates color for readmission rate
Merge branch 'readmission_rate' of https://github.com/Ank13/ops_hospital_mapper into readmission_rate

Conflicts:
	app/models/hospital.rb
Merge pull request #75 from Ank13/readmission_rate

adds readmission bubbles