move service/provider/observer to seperate folders, service updates youbike data in a period of time, discover page can drops youbike icons
Untrack project setting file and upgrade buildToolsVersion to "19.1.0"
Revert "Untrack project setting file and upgrade buildToolsVersion to "19.1.0""

This reverts commit eed990af79d870321c16522873e482b50e5147c7.
Resize tab view in main page