Search Hyper Estraier from PostgreSQL

Hyper Estraier, new version of previously mentioned Estraier has a very good API. So, I wrote pgestraier function for it. Now you can query Estraier indexes directly from PostgreSQL.

It's beta, yada, yada, if it breaks you get to keep both parts. However, it's extremely useful if you want to (left/outer) join index results with data in PostgreSQL.