Update pull request controller and template
Add merge functionality on pull request
Merge pull request #126 from reviewninja/feature/merge-pull-request

Update pull request controller and template
fix: whitespace
add: bot json structure
add: approval, webhook
rmv: stubs.util.js
Merge branch 'master' of https://github.com/reviewninja/review.ninja into MitchK/logging-fix
logging