Add support for setting a default stub in test mode.

Update README regarding unknown coodinates.

Tweaks to wording in section on forward and reverse geocoding for coordinates that do not have known location addresses associated with them.

Fix deprecation warnings on active record scopes

In addition to checking for []/[]= and set/get, also check
for functions like read/write.

Yahoo auth errors: add raw message to warnings

fix regexp match in yahoo lookup to use xml boundary instead of newlines. fixes broken lookup unit test

Added neighborhood method to Geocoder::Result::Google class

Convert :units option value to symbol

Uses secure RubyGems URL

Fixes version check for Ruby 2.0.0

require 'date' so Date#today is available for gemspec.date

Improve regular expressions for queries.