Adds @author notation for some classes
Adds a method to obtain all destinations for a given origin. Adds JavaDocs for the DataProvider
Renames variables for better readability
Merge branch 'master' of https://github.com/EstherAF/Autobuses

Conflicts:
	app/src/main/java/es/estheraf/horariosbus/data/DataProvider.java
Uses DataProvider for getting destinations