[WIP] update mac configure script and add messaging about common port forwarding issue

update mac configure script and add messaging about port forwarding until we maybe use a better solution like how libtorrent does this, or RPC & UDP like this https://github.com/bmuller/rpcudp to avoid most port forwarding issues.
we're still in super beta. :)  i'm just trying to get a working version for folks. it will really help with reducing the # of issues filed.  also the reason i'm trying to standardize everyone on same version of python for now.