Support geared pagination gem

[lazaronixon]

Here's some work around a integration of basecamp geared pagination with elastisearch-rails, the integration is really simple but requires to write some tests.... Basecamp is doind a lot of free advertisment about they are using elasticsearch on their products so I believe it would be widely used.

https://gist.github.com/lazaronixon/193abbd7bd104680bb52fdab6e955aeb