add "Add A Response" button to thread views in discussion tab / inline

Allow new response pagination parameters to pass through thread model.

Markhoeber/documentation/release notes 1 28 14

Add the ability to dark-launch languages

Component Duplicate Documentation

Markhoeber/documentation/lms 1601

Use the publish() api from xblock.runtime.Runtime

From Alison’s input

Add info to release notes. Also add bookmark in Advanced Video Settings section so release notes can link to it.

Convert i18n/make_dummy.py to a standalone script

Registration extra fields: Selectively require/hide registration fields & add optional country/city fields

Alex/no error on empty answer to master

Fix pylint violations from #2129

ORA AI and Peer acceptance tests

ConfigurationModels can be managed using the admin site. They are
append-only, and track the user who is making the change, and the time
that the change was made. The configuration is stored in the database,
and cached for performance.

[LMS-1220]

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]

Extend the capabilities of the REGISTRATION_OPTIONAL_FIELDS
configuration variable, to allow to select, for each individual field,
if it should be 'hidden', 'optional' or 'required'.

Rename the configuration variable to REGISTRATION_EXTRA_FIELDS to reflect
the additional capabilities, and updates the defaults.

As extra fields, configurable through the REGISTRATION_EXTRA_FIELDS
variable. Hidden by default.

Tickets: MCKIN-168 MCKIN-184

Note: Studio also has a registration page, which uses the same account
creation page. It should be possible to use it without requiring the
variable from the LMS, as the fields are different.

Pin test lib versions (fix to test failures in master)

Pin subunit and testtools libraries to prevent test failures after release of these libraries on 1/29/14

JIRA: FOR-374

JIRA: FOR-373

Set the HTML language to the browser's specified language

Updated document and all instances of component screen shots