Badge: build status and link to last built master (#225)
Badge: build status and link to last built master (#225)

Adds a badge with the current build status and a link to the last build job on the jenkins system.
ldimaggi/almighty-core,ALMighty/almighty-core,ldimaggi/almighty-core,ldimaggi/almighty-core,ldimaggi/almighty-core