Add default JS resources

[dnwhte]

Loads default scripts for all snippets. One use case is needing to
load fonts through a service like Typekit where JS loading is the only
option. Needed for loading font in general section (under font and typography).
Note: quick and dirty solution. Could use refactoring.

[yumyo]

Hi, thanks for this, really needed feature.
In the meanwhile, is there any way to manually achieve it? Typekit script keep being removed, no matter if I place it in the head or before the closing body of template.html

[dnwhte]

@yumyo Take a look at ecb9cf5 to see how I was able to do it. The changes are pretty simple to implement.

[yumyo]

Thanks, works smoothly