Fixes version check for Ruby 2.0.0
Merge pull request #403 from mdi/master

Fixes version check for Ruby 2.0.0
Uses secure RubyGems URL
Merge pull request #407 from vfrride/patch-1

Uses secure RubyGems URL
Convert options[:units] to symbol
Merge pull request #411 from j-h-l/master

Convert :units option value to symbol
Added neighborhood method to google result.
Merge pull request #420 from azlantaher88/master

Added neighborhood method to Geocoder::Result::Google class
Update active record scopes to return actual scope object instead of hash
add yahoo auth errors raw message to warnings
fix regexp match in yahoo lookup to use xml boundary instead of newlines. fixes broken lookup unit test
Merge pull request #423 from lukewendling/master

Yahoo auth errors: add raw message to warnings
added NM units option
Check if cache store uses read/write for functions.

In addition to checking for []/[]= and set/get, also check
for functions like read/write.
Merge branch 'master' of git://github.com/vanboom/geocoder into vanboom-master
Increase precision and add proper comment.
Rename method for consistency (use separate words).
Improve indentation/readability.
Add test for nautical miles distance calculation.
Mention nautical miles in documentation.