Document Getting Started about facebook.ex

[mweibel]

Hi Keith,

Example usage: Yes, I agree this would be good. If you have a good example, please feel free to open a PR and add it to the README :)

@httpoison: not sure why you'd need that.. the lib uses hackney as the HTTP library..

[keithbro]

Cool will open a PR

Re httpoison, yep it was required for some reason, I googled the issue I was having and found this on stackoverflow - http://stackoverflow.com/questions/31208923/hackney-fails-to-make-request-to-server - added httpoison and the error disappeared

[mweibel]

thanks!

hmm..very weird @httpoison.. edgurgel/httpoison#126 seems to recommend updating hackney, will try that.

[mweibel]

@httpoison: could you have a look which version of hackney it downloaded? (mix.lock)

[mweibel]

ping?

[mweibel]

Added docs for getting started in the README.