Error on import into split
if import restores a deleted draft element which was never published
PLAT_297
hotfix-2014-11-21
fix NO_PREREQ_INSTALL
Merge pull request #6024 from edx/clytwynec/fix_no_prereq_install

fix NO_PREREQ_INSTALL
Discussion Xblock moved to edx-platform repo
Fixed pylint violations
Refinements and fixes from backporting discussion xblock to edx-solutions:

* Styling fixes
* Runtime-specific overrides for DiscussionUtil parameters
* Discussion XBlocks included in category map
* Removed DOM Ready jQuery handler in main.js - discussions are now initialized externally
 * Fixed production assets issues
Added rtl support for discussion