'''
__author__="Alfonso Tierno, Gerardo Garcia, Pablo Montes"
__date__ ="$26-aug-2014 11:09:29$"
-__version__="0.5.9-r519"
-version_date="Mar 2017"
+__version__="0.5.10-r520"
+version_date="Apr 2017"
database_version="0.20" #expected database schema version
import time