Allows custom handling of geocoding service connection problems.

Fixes #56

Was causing problems when installing with bundler from Git URL.

Instead use a proxy if http_proxy or https_proxy is set. Also revise
code style to be more consistent with rest of library.

Geocoder will try to use environment's http_proxy or https_proxy when doing lookups unless that behaviour has been disabled in the configuration

Specify path to VERSION file relative to lib/geocoder.rb.

Child classes didn't have access to parent's configuration. This is kind
of crude (if geocoder_options not defined, see parent) but it works.

Conflicts:
	lib/geocoder.rb

Conflicts:
	lib/geocoder.rb

Were not returning correct results for reverse or IP address geocoding.

Figures out whether query is an IP address so you don't have to.

Prevents things like: " , ,  , United States".

Show all globally-supported attributes in a table.

Also alias as #province and #province_code.

On input and output (expects/returns lon,lat instead of lat,lon).