fixed typos in upton.rb
Merge pull request #7 from jkokenge/fix_upton_rb_typos

fixed typos in upton.rb
add url_to_filename helper, respect @stash_folder
better scrape_to_csv coping with different levels of nesting in arrays
Merge branch 'master' of github.com:propublica/upton
abstract out fetch_page method
add empty options hash to get_instance, _page, _index methods, better var names

options hash has instance_index value by default that gets passed all the way through, so get_page can differ based on it
url-to_filename takes options; retry on timeouts
preliminary rspec tests
add rspec
fully switch to rspec
Rspec specific changes

	modified:   Rakefile
* Added the default gem tasks. Changed the test task to run the rspec
command.

	renamed:    test/rspec_test_upton.rb -> spec/upton_spec.rb
* The file naming convention is filename_spec.rb. Modified the files as
  per that.

	modified:   upton.gemspec
* Added rspec as a development dependency in the gemspec.