Docs update
Fix problem with static renderings

The issue was that rendertiddlers always clears the output folder,
which meant that it was overwriting anything previously output by the
rendertiddler command.
Temporarily revoke sorting tests

localeCompare seems to behave differently in the browser and under
Node.js, making it hard to get the tests consistent
Docs updates
Fix build scripts
Version number update for 5.0.11-beta
Fix typo
Fix problem with shadow tiddler iteration

See https://groups.google.com/d/topic/tiddlywiki/pNxZsSCVp7c/discussion
for more details of the bug.
Tweak ribbon colour for 5.0.12
Version number update for 5.0.12-beta