Add parsing error for no closing mustache (was throwing js error)
Merge pull request #626 from ractivejs/token-null

Add parsing error for no closing mustache (was throwing js error)
Merge branch 'dev' of https://github.com/RactiveJS/Ractive into dev
Merge remote-tracking branch 'origin/master' into dev
Merge pull request #627 from martypdx/dev

Merge banner fixes and parsing error fixes into dev
Merge remote-tracking branch 'origin/dev' into build-tests