better error message when doing db access in non-db suite
cache get_questions to make navigating app builder faster

cache includes hash of the form content, so invalidation is not
necessary
lazy_fetch_attachment should not throw KeyError
add quickcache and use for get_questions instead
use quickcache on the builds config doc
use quickcache to prevent config docs

use instead of cache_core.cached_open_doc
so it is cached even if the doc lookup 404s
add tests for quickcache

also split corehq/util/tests.py into two files under corehq/util/tests/
without otherwise changing those tests
quickcache fix typo
add tests for quickcache edge cases in key generation
delivery_date filters fixed
Merge pull request #14 from dslowikowski/wrong_indicator_fix

World vision: delivery_date filters fixed
display number of rows in preview data tab
fix DataSourceConfiguration.all

for some reason it passes tests as implemented, but in practice needs
this change to work
Add mngmnt command to delete all cases for a user
Merge pull request #5068 from dimagi/total-row-display

display number of rows in preview data tab
Merge pull request #5069 from dimagi/pillow-fix

fix DataSourceConfiguration.all
Merge pull request #5070 from dimagi/delete-cases

Add mngmnt command to delete all cases for a user
Update submodules
Fix active mobile workers report
Merge pull request #5039 from dimagi/cloudcare-speedup-2

Cloudcare speedup tweaks