Created guidance for preparing SP Provider-Hosted Apps & Office 365 API projects for distro

Created two guidance documents for PnP, per request of @jeremythake, helping developers prepare (1) SharePoint Provider-Hosted Apps projects and (2) Office 365 API projects for distribution either using a ZIP & *[sneakernet](http://en.wikipedia.org/wiki/Sneakernet)* or before committing to a source control system.