RAD-238 Add community badges and license to readme
RAD-238 Add community badges and license to readme

Added badges for
* talk
* irc
* telegram
* radiology wiki
Add link to talk for support
Add link to license
jcantu1988/openmrs-module-radiology,teleivo/openmrs-module-radiologydcm4chee,openmrs/openmrs-module-radiologydcm4chee,teleivo/openmrs-module-radiologydcm4chee,openmrs/openmrs-module-radiologydcm4chee