facilities extraction:: updated data as of 2013-10-01 1210-0700
facilities extraction:: refine (sq)

problem:
at the end of execution, getting:
$ ruby -Imechanize bin/extract_facilities.rb > data/facilities.txt
[...]gems/nokogiri-1.6.0/lib/nokogiri/xml/node_set.rb:214:in `attr': undefined method `attribute' for nil:NilClass (NoMethodError)
        from bin/extract_facilities.rb:235:in `next_page_number'
        from bin/extract_facilities.rb:229:in `call'
        from bin/extract_facilities.rb:218:in `call'
        from bin/extract_facilities.rb:42:in `next_page_number'
        from bin/extract_facilities.rb:33:in `call'
        from bin/extract_facilities.rb:35:in `call'
        from bin/extract_facilities.rb:35:in `call'