Updated serveStaticFile, example and README#7

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TylerThompson wants to merge 3 commits intobwhite000:masterfrom

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Commits on Apr 25, 2015

added new supported file formats like .ico and .eot, also fixed relative path issue with windows. is working. but requested url is still not being found when server starts up on windows machine.
Tyler Thompson
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Commits on Mar 13, 2016

Adding cache file to serveStaticFile, changed http://socialflare.us to http://www.socialflare.us in readme, added support for windows when serving files in serveStaticFile function, updated example
tthompson
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Moved var description because it looked like it was describing the function
tthompson
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