I'd suggest to use something like http://www.kvstore.io. It's a key/value pair storage service that supports the "client-side only environments" like static websites.
It's super easy to use it and gives you the strength to manage your data with a full set of RESTful API... I just posted an article on github/jekyll or whatever integration with kvstore.io... : https://medium.com/@lordkada/store-user-generated-content-from-jekyll-github-pages-or-similar-ded76aabf17#.aqjafjiez
I'd suggest to use something like http://www.kvstore.io. It's a key/value pair storage service that supports the "client-side only environments" like static websites.
It's super easy to use it and gives you the strength to manage your data with a full set of RESTful API... I just posted an article on github/jekyll or whatever integration with kvstore.io... : https://medium.com/@lordkada/store-user-generated-content-from-jekyll-github-pages-or-similar-ded76aabf17#.aqjafjiez
Enjoy
Just my 2 cents..
DISCLAIMER: I'm the author of kvstore.io ;-)