added custom marker
added custom marker

pennysmith1/angularjs-google-maps,hokennethk/angularjs-google-maps,sajeetharan/angularjs-google-maps,stevenlundy/angularjs-google-maps,sajeetharan/angularjs-google-maps,hokennethk/angularjs-google-maps,evaldobarbosa/angularjs-google-maps,allenhwkim/angularjs-google-maps,antho1404/angularjs-google-maps,antho1404/angularjs-google-maps,shirone/angularjs-google-maps,stevenlundy/angularjs-google-maps,pennysmith1/angularjs-google-maps,evaldobarbosa/angularjs-google-maps,allenhwkim/angularjs-google-maps,shirone/angularjs-google-maps