Basic crowdfunding.
Make all timing stuff tz-aware.
Added: Fundusz, dummy payments.
Basically usable funding workflow.
Move excessive funds to WLF
Merge branch 'master' into funding

Conflicts:
	requirements.txt
Some minor funding changes.
Add django-getpaid
migrations for django-getpaid
Skip getpaid's PaymentMethodForm,
remove 'anonymous' option, simply allow anonymous payments instead,
nicer admin pages for funding.
Add offer HTML description.
Some layout experiments.
Different handling of current payment view,
add share icons,
set email for payment broker,
getpaid-1.4, reqs fix.
Minor fix.
minor changes
Merge branch 'master' into funding
TZ-aware tag change date.
Funding wip: rewording and banner tweaks
Fixing widths
Showing/hiding main funding banner
Commiting changes to funding.css