Address issue where the "Remember Me" screen does not appear during the returning user login flow
Add a helper method for sign_in_returning_user
Eliminate the need for expectations to be set when signing in via bidpom
Also more changes to address the Remember Me screen issue
Merge branch 'master' into remember_fix

Conflicts:
	tests/check_add_email.py
	tests/check_sign_in.py
Rename method to _is_page_ready
PEP8 fix for line length
Change wait logic to address grid browser timeout and ensure that 60 seconds have elapsed
Add a comment to explain the wait logic
Merge pull request #68 from bobsilverberg/remember_fix

Address issue where the "Remember Me" screen does not appear during the returning user login flow