Cambios para hacer commit:
	modificado: AndroidManifest.xml
	modificado: src/com/iesebre/dam2/pa201415/ivan/androidskeleton/LoginActivity.java
	modificado: src/com/iesebre/dam2/pa201415/ivan/androidskeleton/MainActivityDrawer.java

arranged facebook revoke.
Twitter revoke fails in my mobile the first time. it seems it close app, when you start again yo are in drawer activity again push revoke and goes right