Create support scripts for `http2-push-manifest.json`

[stereobooster]

• It is possible to create lua script for nginx, which will read http2-push-manifest.json and send appropriate headers.
• It is possible to create ruby script for h2o, which will read http2-push-manifest.json and send appropriate headers.

continuation of https://github.com/stereobooster/react-snap/issues/3

Need to have demo server. Maybe Heroku or similar:

• https://github.com/ripienaar/free-for-dev

Heroku doesn't support HTTP2 so ¯\_(ツ)_/¯

[stereobooster]

Nginx

• lua_shared_dict
• ngx.shared.DICT.flush_expired
• lua-resty-lrucache
• lua-resty-memcached
• lua-nginx-module
• https://stackoverflow.com/questions/47213787/nginx-lua-loading-a-file-once
• lua-resty-redis
• https://gist.github.com/danackerson/af7481a869396839b3da
• https://github.com/openresty/lua-nginx-module/issues/925

[stereobooster]

h2o

• https://github.com/h2o/h2o/pull/460#issuecomment-139123538
• https://www.sitepoint.com/need-a-recipe-for-mruby-flavored-raspberry-pi-just-add-h2o/
• https://lucaguidi.com/2015/12/09/25000-requests-per-second-for-rack-json-api-with-mruby/
• https://github.com/SamSaffron/lru_redux
• https://github.com/minad/moneta
• https://github.com/propublica/daybreak
• https://github.com/mruby/mgem-list
• https://github.com/matsumotory/mruby-memcached
• https://github.com/Asmod4n/mruby-hiredis
• https://github.com/matsumotory/mruby-redis