Update README to reflect Package Control install instructions.
Update README to reflect Package Control install instructions.

ypersyntelykos/GitSavvy,stoivo/GitSavvy,divmain/GitSavvy,dvcrn/GitSavvy,ralic/GitSavvy,asfaltboy/GitSavvy,ddevlin/GitSavvy,ddevlin/GitSavvy,ddevlin/GitSavvy,divmain/GitSavvy,theiviaxx/GitSavvy,asfaltboy/GitSavvy,ralic/GitSavvy,dreki/GitSavvy,stoivo/GitSavvy,dvcrn/GitSavvy,jmanuel1/GitSavvy,theiviaxx/GitSavvy,asfaltboy/GitSavvy,ypersyntelykos/GitSavvy,dreki/GitSavvy,stoivo/GitSavvy,jmanuel1/GitSavvy,divmain/GitSavvy