inline aggregate assets doesn't work as intended

[jwebbdev]

/pull/62 fixes a crash caused when trying to aggregateAssets but there is no way, beyond parsing the results of res.locals.aggregatedassets for strings starting with <script> and <style> to know whether an asset is inline.

In the current mean.io implementation all strings are wrapped in the header/footer with link and script tags, which fails to handle inline assets.

A more elegant solution than adding a lot of string parsing to the core/system/server/controllers/index.js in mean, may be to create a res.locals.aggregatedassets.header.inline, and footer.inline.