More `:bundle` target support for NPM bundler integration

Pushed :bundle target support forward a bit further.

• added :bundle-freq figwheel-option with :once, :always and :smart which bundles when output-to or npm_deps.js changes
• added :auto-bundle figwheel-option so supply basic default bundle config
• log the bundle command and the bunder output when a bundle command fails
• added a warning to ensure the :output-to is inside the :output-dir for the bundle target
• added --install-deps cli support to the schema