* make activity feed items and open bounties view show badges for ETH
and tokems and total USD in item description
* make top hunters work based on total USD value paid out in bounties
* upgrade lein-cljsbuild
* add simple tab for showing all open bounties (#37). Probably needs
some UX improvements
* rename old "bounties" tab to "manage payouts"
* fix issues in db migration
* do not allow toggling of repositories without a saved Ethereum
address (Fixes: #20)
* fix react warning on activity view
* fix bugs in payout related re-frame handlers
* project file tweaks
Error handling improvements
* show error message on UI in case repo toggling fails
* eliminate possibility of creating multiple webhooks
Store comment PNG for all balances of a bounty (Fixes: #22)
* include balance in computation of verification hash for image request
* store hash in db
Refactoring
* use 'owner' for a repo owner everywhere instead of 'login'
Minor
* move cider dependencies to top-level in project file to avoid errors
with tests and migratus
Changes to bounty/pull-request data model and logic
* save git sha of pull request's HEAD instead of possible merge commit
and save it for opened, merged and closed events
* only look for bounties being accepted in pull-request closed via
merge events (no need for compilicated logic with issue-closed event)
* pull_request now has issue_id column to make many sql queries
simpler
Frontend
* owner-bounties app-db structure changes
* bounties view with confirm pending payout UI
Other
* removed lots of unused legacy code
* bug fixes + refactoring
* added comments + TODOs
Secure Github webhooks (Fixes#18)
* Use a unique random secret for webhooks
* Validate payload signature when receiving webhook
Make enabling + disabling a repo more robust
* store repository state instead of enabled flag in DB
* atomic toggle UI button (Fixes#17)
New UX for managing repos
* group repos by owner
* look and feel according to UI spec
General improvements
* only request user's repos via Github API once per session
* fix issue with cljs code figwheel reload
* simplify app-db structure
