wrote a function that takes individual quizzes (currently not tested for multiple tabs/quizzes/answer types and also added a 502 errror detector to helpers (but did not implement in all other tests). For the section and quiz processing see course-section-content.py

added high level tabbing check in high-level-tabs.feature and commmitted change pointing the smart-accordion to stage-edx-001

Merge branch 'mchang/acceptance-testing' of https://github.com/MITx/mitx into mchang/acceptance-testing

updated accordion to iterate through chapters (weeks) and sections (problem sets, questions, etc) to test links

Rewrote course adding and dropping to be able to handle a list of courses--to work it currently uses a hardcoded list with one course in it. In addition broke out utility methods into helpers.py. Withink helpers (and elsewhere where appropriate) created a local variable 'url' to allow for easy switching between sandbox and staging applications. As of commit, all 55 steps pass.