Added javascript class that allows modular/swappable insertion of external content into containers:
     + local content is embedded.
     + external content is loaded into an iframe.
     - However doesn't work for embedding video for some reason.

    Added some error catching that's useful with swappable content containers; If container w/component isn't there, then skip running that process. Utilized with:
     + Weather container
     + Twitter container
     + Time/Date container

Signed-off-by: Kelly Nelson <kel@crk.umn.edu>