Updating README for OSX 10.11 and fixing build badge
Updating README for OSX 10.11 and fixing build badge

achmiel/osquery,tburgin/osquery,jacknagz/osquery,trizt/osquery,pathcl/osquery,friedbutter/osquery,hackgnar/osquery,PickmanSec/osquery,mchugh19/osquery,pathcl/osquery,jedi22/osquery,jedi22/osquery,PoppySeedPlehzr/osquery,jacknagz/osquery,achmiel/osquery,mwielgoszewski/osquery,tburgin/osquery,hackgnar/osquery,tburgin/osquery,justintime32/osquery,PoppySeedPlehzr/osquery,jedi22/osquery,PoppySeedPlehzr/osquery,mchugh19/osquery,PickmanSec/osquery,justintime32/osquery,mchugh19/osquery,trizt/osquery,pathcl/osquery,trizt/osquery,mwielgoszewski/osquery,justintime32/osquery,friedbutter/osquery,hackgnar/osquery,friedbutter/osquery,achmiel/osquery,jacknagz/osquery,PickmanSec/osquery,mwielgoszewski/osquery