Removed number of customers for Pbes and PbesSQL
Added onLoadMinimumBalance and a new menu item on data to
load minimum balance from excel. If you dont load
the minimum balance first, the balance of the customers will be 0
Merge remote-tracking branch 'github/master' into SQLiteStorage

Conflicts:
	uem.basesDeDatos.alonsostein.git/src/activity10/Pbes.java
	uem.basesDeDatos.alonsostein.git/src/activity19/PbesSQL.java