Track Sphinx versions.

This isn't useful for much beyond determining Sphinx versions for Flying Sphinx.
Merge pull request #449 from davidcelis/master

Add deployment tasks for use with Capistrano
History details are in most-recent-first order.
3.0.1
Query errors get classified as such.
Fix references to thinking_sphinx rake tasks as ts

Signed-off-by: David Celis <me@davidcel.is>