first working implementation of adaptive payments using papypalx
Add PayPal email setting in trac
add UserAttribute table
implement update user; replace UserAttribute table with column
trac plugin updates user attributes via API
initialize migration directory; add paypal_email to user table
get rid of src/ directory in trac plugin
reorganize project structure - api dir, namespace package
update README - website, api dir
update README
good bits from direct payments to developers

refactored payment gateways, introduced factory, deleted rest gateway
ticket owner
developer paypal email
rename PLAIN payment gateway to DUMMY
working WSGI
add logging settings: propagate exceptions, sql
merge branch 'wsgi'
add WSGI stuff to README
improve WSGI config in README
note that port number only applies for standalone API
retrieve API version properly also in WSGI mode
fix logging options; add http logging