Adds escape to prevent logger from choking on character enncoding in Google3 geocoder.

This fix the follow error:

    An Encoding::CompatibilityError occurred in registrations#update:
    
    incompatible character encodings: UTF-8 and ASCII-8BIT /home/git/.rvm/gems/ruby-1.9.3-p194/bundler/gems/geokit-e712f0a7b21a/lib/geokit/services/google3.rb:63:in `do_geocode'