Attempt to resolve issue 579.

Config file is not being picked up when running `hugo server --watch`
from within the hugo project directory (the site).

I know this is intended to solve an issue with hugo (I see it as an issue anyway)... but isn't it a good idea to have  "." in the configPaths?

I am not familiar with either Go, Hugo, or Viper so most likely there is a better solution.

Regards,
Justin