fixed #65
fixed #60
v2.1.3-2014030100-moodle_26

#66 Put white background color in code text (below QRcode picture)
#62 paging in Bulk operations doesn't work correctly
#60 Clear not set variables 
#57 folder separation string
#55 Manager certificate is not removed
#54 certdatefmt left with old values after upgrade
#53 Fix some tables parameters 
#65 Verify completation