admin csv export improvements

- rename original csv to pledge_amounts.csv
- create new csv export for the histogram called pledges.csv
- use zipgun library to convert zipcodes to lat/lon
- change csv generation queue rate limit to 1/h
- provide persistent link to latest export
fix bulkloader conflict
Merge pull request #112 from MayOneUS/bulkloader_conflict

Fix bulkloader.yaml conflict.  I'm fairly confident that this will result in the file that Brian wants.
use batch processing for data export
admin command to update user info from stripe/paypal
Catch cases without Paypal Transaction IDs.
Sort by donation time descending, so we use the address from the last pledge.
Merge branch 'csv_export' into mainmaster
Try to eliminate scary flag on receipt page
Merge remote-tracking branch 'origin/master'

Conflicts:
	bulkloader_backup.yaml