Added support for Quora.

It's not 100% tested though.
Merge branch 'master' of github.com:otar/buffer-extension-shared into otar-master
Adjustments to Quora integration script.
Adjustments to Quora integration.
Style adjustments to Quora script.
Merge pull request #44 from bufferapp/otar-master

Added support for Quora.