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
Teemu Patja