CHANGELOG entry for the whitelistable sandboxing change.

need to comment out another thumbnail check due to build test environmen...

need to comment out another thumbnail check due to build test environment not having libjpeg installed

These CHANGELOGS were never used, and are now obsolete.

disable assertions on thumbnail generation as it puts a system requireme...

disable assertions on thumbnail generation as it puts a system requirement on libjpeg which may not be installed on the test machines

Feature/cale/xblock init

Fixes JIRA LMS-203

Feature/cdodge/soft delete assets

allow for an optional throw_on_not_found on contentstore().find() so we can clean up caller logic in the tests

add new collection configuration to support a 'trashcan' for assets. Update class factory to allow callers to specify if they want the default set of assets or the trashcan

Added info to changelog for recent pull requests.

Addtional comments for YouTube API bug.

fixing segment io settings bug

* Moving to the auth tokens section
* Removing the feature flag logic since all features are loaded earlier
```
    for feature, value in ENV_TOKENS.get('MITX_FEATURES', {}).items():
        MITX_FEATURES[feature] = value
```

Update to look for segment io key in auth data.

Simplify calc.py; add trig/other functions

Default to unicode for sass compilation.

Replace /faq route in LMS urls

remove compiled coffeescript files before recompiling with rake