Added rst version of cognitive load page
add So You Want to Deploy a New Service
address review comments from @nedbat
renamed cognitive_load.rst to code-considerations.rst
disabled test_lms.py:XBlockAcidNoChildTest.test_acid_block
Update Video docs to reflect new UI
Merge pull request #3740 from edx/sylvia/docs/BLD-1032

Update Video component to reflect new UI
Merge pull request #3758 from edx/clytwynec/disable-XBlockAcidNoChildTest

disabled test_lms.py:XBlockAcidNoChildTest.test_acid_block
link to code considerations page from contributor doc
Merge pull request #3752 from edx/db/doc-cognitive-load

Added rst version of cognitive load page
Use local storage instead of S3 for uploads in devstack.
Use path already created by ansible.
Merge pull request #3615 from jazkarta/devstack-local-filestorage

Use local storage instead of S3 for uploads in devstack.
Dev support for context-sensitive help.
Update of all templates
Changed help button to link and removed drop-down items
Acceptance tests for online help.
Added new context sensitive link and updated text
Sock template changes
Updated tests for online help
Merge pull request #3619 from edx/markhoeber/documentatoin/online-help-system

Online help system
Allow creation of components on container page

This commit implements STUD-1490, allowing creation of components
on the container page. It also enables the delete and duplicate
buttons now that new content can be created that would benefit.