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
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
Added new error message that displays when HTML5 video is not supported altogether. [BLD-638]
Error message is correctly displayed when HTML5 video is disabled by user
Added error message inside video tag instead. Hide spinner when no HTML5 video is defined or video tag not supported.
Removed exclamation point from error message.
Addressed comments.