"Your First PR" language in README
"Your First PR" language in README

Add language about getting started in contributing to OBA.
ualch9/onebusaway-iphone,ualch9/onebusaway-iphone,OneBusAway/onebusaway-iphone,themonki/onebusaway-iphone,themonki/onebusaway-iphone,OneBusAway/onebusaway-iphone,chadsy/onebusaway-iphone,cathy810218/onebusaway-iphone,OneBusAway/onebusaway-iphone,aaronbrethorst/onebusaway-iphone,OneBusAway/onebusaway-iphone,aaronbrethorst/onebusaway-iphone,cathy810218/onebusaway-iphone,OneBusAway/onebusaway-iphone,aaronbrethorst/onebusaway-iphone,themonki/onebusaway-iphone,cathy810218/onebusaway-iphone,chadsy/onebusaway-iphone,ualch9/onebusaway-iphone,themonki/onebusaway-iphone,ualch9/onebusaway-iphone,aaronbrethorst/onebusaway-iphone,cathy810218/onebusaway-iphone,chadsy/onebusaway-iphone,ualch9/onebusaway-iphone,chadsy/onebusaway-iphone,themonki/onebusaway-iphone