[travis] use make to install luarocks dependencies
Merge pull request #26 from APItools/unify-deps

[travis] use make to install luarocks dependencies
Use OPENRESTY variable
Merge pull request #30 from potomak/travis-config-minor-fix

Use OPENRESTY variable
Add slow request GitHub issue middleware

Open a GitHub issue when a request takes too much time. If a slow request
to the same URL occurs more than once the middleware updates the associated
issue by reopening it.