Determine is_local not based on cwd but on existence of setup-release.py
Determine is_local not based on cwd but on existence of setup-release.py

The goal is to be able to run local instances from arbitrary directories.
It seems that the chances of having a setup-release.py in the same directory
as an installed electrum are extremely remote: not only is the name unusual,
but the file isn't installed anyway.

wakiyamap/electrum-mona,molecular/electrum,neocogent/electrum,aasiutin/electrum,cryptapus/electrum-uno,cryptapus/electrum-myr,cryptapus/electrum,asfin/electrum,pooler/electrum-ltc,vertcoin/electrum-vtc,wakiyamap/electrum-mona,lbryio/lbryum,molecular/electrum,cryptapus/electrum-uno,vialectrum/vialectrum,imrehg/electrum,spesmilo/electrum,argentumproject/electrum-arg,romanz/electrum,dashpay/electrum-dash,vertcoin/electrum-vtc,dabura667/electrum,spesmilo/electrum,pooler/electrum-ltc,imrehg/electrum,vertcoin/electrum-vtc,cryptapus/electrum-uno,procrasti/electrum,argentumproject/electrum-arg,FairCoinTeam/electrum-fair,fujicoin/electrum-fjc,cryptapus/electrum-myr,molecular/electrum,dashpay/electrum-dash,vialectrum/vialectrum,fireduck64/electrum,vialectrum/vialectrum,digitalbitbox/electrum,argentumproject/electrum-arg,digitalbitbox/electrum,spesmilo/electrum,wakiyamap/electrum-mona,protonn/Electrum-Cash,cryptapus/electrum-uno,imrehg/electrum,protonn/Electrum-Cash,fireduck64/electrum,dashpay/electrum-dash,vertcoin/electrum-vtc,fireduck64/electrum,dabura667/electrum,neocogent/electrum,fyookball/electrum,asfin/electrum,kyuupichan/electrum,spesmilo/electrum,cryptapus/electrum-myr,FairCoinTeam/electrum-fair,protonn/Electrum-Cash,asfin/electrum,FairCoinTeam/electrum-fair,neocogent/electrum,cryptapus/electrum-myr,fyookball/electrum,pknight007/electrum-vtc,procrasti/electrum,pooler/electrum-ltc,cryptapus/electrum,fyookball/electrum,pooler/electrum-ltc,FairCoinTeam/electrum-fair,pknight007/electrum-vtc,aasiutin/electrum,digitalbitbox/electrum,pknight007/electrum-vtc,molecular/electrum,lbryio/lbryum,procrasti/electrum,argentumproject/electrum-arg,aasiutin/electrum,procrasti/electrum,dabura667/electrum,dabura667/electrum,fireduck64/electrum,fujicoin/electrum-fjc,digitalbitbox/electrum,fujicoin/electrum-fjc,imrehg/electrum,kyuupichan/electrum,romanz/electrum,wakiyamap/electrum-mona,pknight007/electrum-vtc,aasiutin/electrum,romanz/electrum,protonn/Electrum-Cash,dashpay/electrum-dash,cryptapus/electrum,kyuupichan/electrum