tests for entry and coordinate area models

test for the entry and coordinate_area models.  they are far from dry. might use contexts but I don't yet see their benefit for these. recommendations appreciated!

The files I made are "entry_spec" and "coordinate_area_spec".  The others were generated by other things.
Aside from appeasing the hound on the single-quotes and the extra-long lines, consider deleting all of these comments. They can be found again right here:

https://github.com/plataformatec/simple_form/blob/master/lib/generators/simple_form/templates/config/initializers/simple_form.rb