Fix showdown package (and docs)

Restore UI.body

Fix a memory leak

All the teardown callbacks would stack up on the parent element.  No longer.

bump the redis-livedata version

Do feature detection instead of browser detection for ui test.

The previous `isIE()` check returned false for IE11.

Do feature detection instead of browser detection for ui test.

The previous `isIE()` check returned false for IE11.

Use _.toArray to make IE8 happy

Merge branch 'fix-ui-hooks-nested-domranges' into release-0.8.2

Add a changePassword test

bump dev bundle; upgrade node

Conflicts:
	docs/client/concepts.html
	meteor
	scripts/generate-dev-bundle.sh
	tools/bundler.js
	tools/main.js
	tools/server/boot.js