Update api.md
Update api.md

Bugs in docs.  Fix broken links.
transistorsoft/react-native-background-geolocation,transistorsoft/react-native-background-geolocation,transistorsoft/react-native-background-geolocation,transistorsoft/react-native-background-geolocation,christocracy/react-native-background-geolocation,transistorsoft/react-native-background-geolocation,transistorsoft/react-native-background-geolocation,christocracy/react-native-background-geolocation