Remove 10 post restriction for related posts module
Merge branch 'master' into module-related-posts-29patches
Related Posts Module: Cleanup URLs for related links

Prior links in related posts were to the originating post with a post_id to
redirect to in order to track click stats. This patch makes the flow
cleaner by getting rid or the redirect and cleaning up the URL so that it's
more sensical.

* RP links are set to the permalink of the target post without any params.
* On click JS extracts meta data about the click event and attaches it as
  query params to the target link. (Related post display position and
  originating post_id.)
* On the target page, upon render, the GET params are used to track CTR
  stats and post exclusions are set as a data param on the related post
  div.
* On load the target page will remove the related post meta query params
  that were added to the URL and reset history state to prevent cruft.
Merge pull request #304 from xyu/module-related-posts-29patches

Cleanup URLs and remove post limit restrictions