add different method of limiting default report users to a group
merge master
move code to psi submodule
remove more psi reports stuff
Merge pull request #482 from dimagi/psi-submodule

move code to psi submodule
fix a silly error that was causing case properties to show up twice in an export
Merge pull request #483 from dimagi/double-properties

fix a silly error that was causing case properties to show up twice in a...
Minor changes

- include User Agent in bug reports
- center default landing page content
Merge pull request #484 from dimagi/mwhite

allow a report to filter by a group by default, and other minor changes
Merge branch 'master' into cc-autosync-freq