Adds select_option function for drop down select elements
Adds Get Mozilla Updates widget tests

Note that the `select_option` function is included in this because it's
used to select the country in the form.
Adds `get_response_code` back in because I accidentally removed it
Removes unused Timeout import
Removes unecessary backslashes
Moves Selenium actions to page.py
Moves email form tests to about.py and other tweaks

* Changes the names of the locators and tests to be more consistent
with other email tests
* Adds a test to check if the form exists
* Adds a test to check if the form fields exist
Fix for test fail

* Changed a few test names. I think it makes it sound less awkward
* Changed the success url for some tests to URL slugs
* Updated a URL variable to be more appropriate for the new test
location
Merge pull request #163 from casschin/get-mozilla-updates

Adds tests for Get Mozilla Updates widget