Upgrade spatial_adapter or replace it with RGeo

Among other things, we need to upgrade the server to Postgres 8.4 or higher so we can use PostGIS 2.0. Maybe I should just dump the data on the server and upgrade straight to Postgres 9.2...

Ah, it looks like we can at least upgrade the server to PostGIS 1.5, which RGeo will support, before upgrading PostgreSQL itself.

OK, server is upgraded to 1.5. We'll still want to go further, but at least we can install RGeo now.

(from [6e442df0c213cac3975bddec848d2938575d21c0]) Replace spatial_adapter and georuby with activerecord-postgis-adapter and rgeo. [#86] https://github.com/marnen/quorum2/commit/6e442df0c213cac3975bddec84...

(from [97ebef43ddbe3a4fae561e81b5bda612dd661a5e]) Remove file that's no longer needed. [#86] https://github.com/marnen/quorum2/commit/97ebef43ddbe3a4fae561e81b5...

(from [e90342926a54070a23eb7a097a48bad0801888a2]) Dump schema in new format. [#86] https://github.com/marnen/quorum2/commit/e90342926a54070a23eb7a097a...

(from [5a821c5bd9c82399ce8d284a4dc6810d65ce18d3]) Update geometry columns to new format. [#86] https://github.com/marnen/quorum2/commit/5a821c5bd9c82399ce8d284a4d...

(from [985c50959b747ae17a1d484fb0d19e18d8b1eb15]) Use my fork of rgeo-activerecord. [#86] https://github.com/marnen/quorum2/commit/985c50959b747ae17a1d484fb0...

(from [537fee24541d599237a5e670e869716390951f86]) Change GeoRuby to RGeo syntax. [#86] https://github.com/marnen/quorum2/commit/537fee24541d599237a5e670e8...