added tests for issue 59 - Edit User Mail Preferences.

P.S. Together with Bebe we were able to create this test :D
implemented changes as suggested by AndreiH's code review

I also added pep8 checks to Aptana, so I hope I won't have so many code
style comments from now on :)
Update locator to use By.ID
Add test to verify advanced options are visible
Merge pull request #78 from anah/events

Add test to verify advanced options are visible and update locators to use IDs
Merge pull request #62 from alexrotaru/test_settings

added tests for issue 59 - Edit User Mail Preferences.
Fix for failing CI tests
Merge pull request #79 from AndreiH/fix_people

Fix for failing CI tests