v0.11.5 - Spookay!

There's just some search fixes in this release. Important, but not especially interesting.

From the CHANGELOG:

* Several search fixes:
  - With postgres search:
    * Fixed reindexing after it broke with the previous update that eliminated
    a lot of unneeded extra rows in the database.
    * Fixed basic queries with NOT statements.
    * Separately, fixed using NOT with subqueries. On a somewhat complicated
      note, but in a way that appears to match standard Solr behavior, when
      doing a query like "name:chef* AND NOT (admin:true OR admin:bleh)" it
      works as is, but when a negated subquery is followed by another basic
      query statement, it needs to have extra parentheses around the NOT +
      subquery, like "name:chef* AND (NOT (admin:true OR admin:bleh)) AND
      public_key:*". A convoluted and unlikely scenario, but it could happen.
  - With in-memory search:
    * NOT + subqueries was also broken with the in-mem search. The fixes for
      the pg-search partially fixed it for in-mem in that it no longer made the
      server panic, but it was returning incorrect results. Additional work
      ended up being needed for in-mem search.