Add new class MultiplePulsingHaloLayer, used for creating multiple layers of pulsing halos.
update readme for multiple halos
Merge branch 'master' of https://github.com/jiecao-fm/PulsingHalo
add some comments
Merge pull request #10 from jiecao-fm/master

New class used for creating multiple layers of pulsing halos.
Update PulsingHalo.podspec
Update PulsingHalo.podspec
Merge remote-tracking branch 'upstream/master'

Conflicts:
	PulsingHaloDemo/ViewController.m