Upgrades to latest pyfs to support auth not through environment variables

Upgrades to latest pyfs to support auth not through environment variables

    Modified to a setting in CMS common.py and aws.py
    Also factored out are: ADVANCED_PROBLEM_TYPES

    This enables third parties to add XBlocks to their system
    without having to make a code change.

    Code also added to ensure that a component should exist in both
    ADVANCED_COMPONENT_TYPES and the course advanced module list
    in order for it to be enabled in the course.

This is not currently being used in production and will not
be used moving forward since logs are remoted using splunk

STUD-1725

Move modulestore django settings migration code down into the modulestore layer so it works for all django-based callers.

Refactor get_parent_locations STUD-1663

Support incremental conversion of events from the old API to the new, in order to ensure the new system is working, enrollment events have been modified to make use of the new API.

Add some optional policies around password resets, such as password reuse, forced password resets, allowed frequency of password resets

Changed "Status Page" -> "Page".

UX:
    support for displaying built-in tabs
    restored drag and drop on Studio Pages
    additional styling for fixed state on Studio Pages
    add a new page action added to bottom of Studio Pages

Dev
    changes for viewing tabs in studio,
    refactored the tab code,
    decoupled the code from django layer.
    is_hideable flag on tabs
    get_discussion method is needed to continue to support
external_discussion links for now since used by 6.00x course.
    override the __eq__ operator to support comparing with
dict-type tabs.

Test
    moved test code to common,
    added acceptance test for built-in pages
    added additional unit tests for tabs.
    changed test_split_modulestore test to support serializing objects
that are fields in a Course.

Env:
    updated environment configuration settings so they are
    consistent for both cms and lms.

Added tests
Converted scripts to django commands
Removed advanced module requirement
Generalized to platform
Switched to subprocess for shell commands
Beefed up resiliency and error checking.
Refactored since #1910 removed get_location_and_verify_access
Added settings to aws for export directory and reworked test setup and teardown
Several review based fixes
Added line to Changelog
Changed URL handler to be accepting and moved git bare repo inside of test_root/data
Added exception logging to help trace issues
Added output in exception logging
Made the branch to commit to explicit instead of implicit
Skipping git identity test on condition of global configuration set

If the FEATURES['USE_CUSTOM_THEME'] flag is set but the
'THEME_NAME' is not set.  We get a compilation error during
cms gather assets.

To mark a language as dark-launched, add it to the DARK_LANGUAGES
django conf setting. To activate a dark-launched language, set he
query parameter `preview-lang` to the language code on any url.

[LMS-2045]
[LMS-2077]
[LMS-2076]

Introduction of the Microsite feature which allows for limited multi-tenant branding on a subdomain basis, e.g. foo.edx.org and bar.edx.org

fix errorenous logic when running a microsite that could reside in a hosting environment with a marketing site in front of it

pep8/pylint fixes

address PR feedback, remove underscore from test hostname

more pep8/pylint cleanup. Skip test_microsites test, it works on localdev, not on Jenkins. Need to talk with QA team

manually add Ned's single-to-double quote fix

change aws.py runtimes so that the microsite_dir that is read from configuration is changed to a python path

Conflicts:
	lms/templates/help_modal.html

Fix bug introduced by #1919: usage of not-yet-defined AUTH_TOKENS dict.

This allows emails to be sent by Studio.

Let staticfiles determine the footer URLs

For a smoother transition to the new world

The input string is not expected to contain any unicode characters

fixes this commit - https://github.com/edx/edx-platform/commit/5ec77010e3bc0303cdb06ebf32e806936fd36ce6

This is the base directory for course data