Assets: fix assets_summary template issues due to Jingo changeover
Wallet Journal: fix errors caused by no 'Group by <time period>' option being selected by default
Assets: hopefully fix intermitten errors due to Django 1.5 stupidity
BPcalc: fix some view/template issues causing errors when trying to use certain blueprints
Blueprints: fix blueprints_import template issue due to Jingo changeover
Home: fix home template issue that shows up very occasionally