Ideally, datenimperator-add-ovi would have been rebased to master before
being merged.

Use \A and \z in regular expressions to avoid newline issues. Also, do not consider any address that begins with 127 to be a loopback IP.

Should close #374.

Should resolve half of #374.

Now it is necessary to specify which service is being used:
  Geocoder.configure(:maxmind => {:service => ...})
where '...' is one of: < :country | :city | :city_isp_org | :omni >

If you do this:

  Geocoder::Query.new("Kremlin, Moscow", :params => {:language => "ru"})

you should get a response in Russian ("ru") regardless of the value set
in Geocoder.configure(...).

Now every fake query does not need to be listed in the code, a fixture
just needs to be added.

Changed since pull request was submitted.

Also add test for method presence in all lookups.

Make Geocoder.configure accept a hash (now preferred) and add
Geocoder.config method (for reading config). Deprecate old syntax.

Previously they were testing many things which were not configuration.
All we care about is whether settings are read/writeable via the methods
provided.

This requires changing the way stubs work, so that they only simulate
actual HTTP calls, not cache hits.

Also move API key config to separate method.

Allow lookups to define a cache key (defaults to the query URL) and
define Yahoo's as the non-OAuth-encoded request URL.