*[6]* Implement functionality to add a custom message to every page

[hackdna]

For example, to notify users that the site is in private mode.
Tasks:

• add a settings variable to the base template via a context processor
• deploy to scc-stage
• add Sphinx documentation
• add an option to display the message to anonymous users only

Pivotal Tracker story 48267341 (Ilya Sytchev - Apr 17, 2013)

[hackdna]

Commit by Ilya Sytchev
ccfafbf

[Delivers #48267341] Add REFINERY_BANNER settings variable to the base template via a context processor. (Ilya Sytchev - Apr 17, 2013)

[hackdna]

Commit by Ilya Sytchev
4d3b4ca

[#48267341] Don't display the banner div if banner message is not configured. (Ilya Sytchev - Apr 17, 2013)

[hackdna]

Commit by Ilya Sytchev
b934e16

[#48267341] Add documentation for the REFINERY_BANNER settings variable. (Ilya Sytchev - Apr 17, 2013)

[hackdna]

Commit by Ilya Sytchev
600948e

[#48267341] Add an option to display REFINERY_BANNER to anonymous users only. (Ilya Sytchev - Apr 17, 2013)

[hackdna]

Commit by Ilya Sytchev
e68437f

[#48267341] Add Sphinx documentation for REFINERY_BANNER_ANONYMOUS_ONLY and change its default value to False. (Ilya Sytchev - Apr 17, 2013)

[hackdna]

Commit by Ilya Sytchev
47ac181

[#48267341] Base template code cleanup. (Ilya Sytchev - Apr 22, 2013)