Refactor RSS support to make it easier to reuse. *cough*cck georss support?*cough*

Fix tests to load location_node.

Split relevant uninstall sections out into location_node.install and location_user.install.

#382758, reported by skyredwang: Allow the user to hide all fields, not just "real" fields, on the location address field.

Fix #373723. This is a modified version of the patch I provided there, changed slightly to be appropriate for general inclusion.

* Add JIT geocoding. To use with bulk importing, set the source to 4 when inserting your locations into the {location} table, and enable JIT geocoding on the Location settings page.

#368141 by jhedstrom: Fix missing include on earth.test. (On my system, for some unknown reason, the test ran just fine without it, which doesn't make any sense...)

Fix delete location checkbox when not collecting coordinates, due to a misplaced brace.

This is a bit of a band-aid fix. The problem was due to me changing the implementation at the last moment when designing it.
The original plan was to use a multi select, but that didn't play well with ajax. The query function still relied on the format
that would return sometimes.

Should fix UK geocoding and improve geocoding outside the us in general.

Sync google geocoder list, alphabetize to match spreadsheet, add country names for easier maintenance.

#355320 reported by WesleyTx, patch by bec, modified by me: Make CCK Location respect the "hide fields" settings.

* Add 'nodiff' option to fields in the 'defaults' op of hook_locationapi().
  - This is needed to unbreak cow after the [#352550] change.
* Unbreak cow, again.

location_diff was conflicting with hook_diff(). It has been renamed to location_calc_difference()!

Add relationship support for location CCK fields. This gets us most of the way to full location_cck views support.