All apps should reference shared.topic_tools rather than main.topicdata, for fewer cross-app dependencies (and to avoid the main-specific, big computations in main.topicdata)
Central now needs gettext, since coach reports are localized.
Small cleanup items
Merge branch 'release-0.11.1' of github.com:learningequality/ka-lite into no_central_content_root
Get coach reports to work--had fouled up the url naming
Generalize the splat handler, to work for phase 2 (and not just KA topic tree)

Conflicts:
	kalite/main/views.py
show options to go to previous or next exercise
Merge branch 'release-0.11.1' of github.com:learningequality/ka-lite into 305
added missing close tags, reorg'd code to do proper mem-cached reloading
mark KA-LITE-MOD on external library mods; better default for Django lang
Removing stray jpg
Merge pull request #1233 from bcipolli/no_central_content_root

Eliminate central server's CONTENT_ROOT
Update prev/next html to show progress, fix small splat hanlder to handle leaf nodes.
Merge pull request #1241 from aronasorman/305

Allow going to previous or next set of exercises
Merge branch 'release-0.11.1' of github.com:learningequality/ka-lite into big-ideas-demo

Conflicts:
	kalite/main/views.py
	kalite/settings.py
	kalite/shared/topic_tools.py