Need a mimetype detection system

[patrickmj]

Initial Estimated Time
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1/2 day

How this moves the project forward
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For TextMedia and Jwplayer renderers, we need to detect the mimetype before pointing to it so we can case-switch about how to proceed, and what to give to JWPlayer

Describe the enhancement
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Something in the Ceres\Util namespace (need to figure out new class or does it fit in existing classes?) to do a curl headers request and parse out the results.

URLs to refer to

https://stackoverflow.com/questions/12656889/php-get-remote-file-mime-type

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