Added the ability to inline JS and CSS

[simultech]

Adds the ability to do inline JS/CSS with pipeline by adding ‘inline’
to the template tag, aka:

{% javascript 'head_js' 'inline' %}

This pull request is for the aim of opening the discussion around what needs to be done to enable inline embedding of Javascript and CSS directly into the page. This is useful when optimizing network requests for styles/scripts only relevant to a single page.

[toabi]

This feature would also be useful for me.

[simultech]

Anyone reading this we were able to monkey-patch it in to live by duplicating the template-tags in your own app, and overriding the django-pipeline tags to support 3 arguments (and then return the output into the template)

[davidt]

This seems reasonable, but a cleaner solution would be to have separate templatetags instead of trying to parse a variable number of arguments.

[mbeijen]

Inlining CSS is also great for HTML emails! I'd really would like to get support for that in this module. Is there anything I can do to help get this module in better shape?