Further shuffling to get this to fit the standard code layout

* Move tests and code into elastic_recheck
* Get 'tox -epy27' working
* Tweak setup.cfg for elastic_recheck

The goal here is: pip install elastic-recheck, import elastic_recheck

Change-Id: Iab9fdf49dc51127a826f0908da3c238c49cbe434
Add query for bug 1230407

Change-Id: I2bb21501054d86a6886868470aa778607f7d61da
Update future work section in README

So we have a record of it that isn't just in my head.

Change-Id: I100ab16cc99a75dfd5fa6d3b643eb9957475b0ef