Merge branch 'release-0.7.12' into dev
Added "allow-popups allow-forms" to iframe sandbox

Adding these to sandbox so that link variables can work with forms
allowing inclusion of link.[pattern-name] in JSON
moving the mustache pattern loader into its own class
deleting the old mustache pattern loader
referencing the new pattern loader
removing the "use" calls
Merge branch 'feature-loaders' into dev
can add multiple classes via style modifiers
spacing comments
better matching mustache escaped and unescaped data
adding support for simple lists
removing unnecessary set-up of an extension
generalizing the pattern loader instance
a twig pattern loader class
adding config option to switch patternEngine
support for pattern extensions based on pattern engine
load the pattern engine in the loader
pattern lab twig loader
cmd+a will only be turned off when code view is up