proxy for data-URI images

Mozilla isn't validating badges that have a data-URI for their
image. Until I get that sorted out, this is a workaround that
will proxy those images through the app. Not ideal, but it
should work for now.
text clarifications
noop
session check for iframe cookie problem
error in badge_reuse_code lookup
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fix redirect after oauth
session fixer part 2
fix badge reuse code frd
Merge remote-tracking branch 'upstream/master'