slather!x
add coverage badge to README
Merge pull request #18 from venmo/marklarr/slather

slather!
Update README to use Coveralls badge for master.
Merge pull request #19 from venmo/ayanonagon/badge

Update README to use Coveralls badge for master.
Merge branch 'master' into remove_afnetworking

Conflicts:
	Podfile.lock