Cambios para hacer commit:
	modificado: res/values/strings.xml
	new file:   src/com/iesebre/dam2/pa201415/ivan/androidskeleton/BaseUtils.java
	modificado: src/com/iesebre/dam2/pa201415/ivan/androidskeleton/LoginActivity.java
	modificado: src/com/iesebre/dam2/pa201415/ivan/androidskeleton/MainActivityDrawer.java

revoke 3 social networks button works fine now..
progressdialog fails in google when hide.