Major rework of the way server, client and certificates are handled

.gitignore

Makefile.certs

Makefile.clients.prod

Makefile.server.dev

Makefile.server.prod

config/certificates/README.md

config/certificates/ca.info.dev

config/certificates/ca.info.prod

config/certificates/gen-cert.sh

config/certificates/nexus-server.info.dev

config/certificates/nexus-server.info.prod

config/server/pki/.gitignore

src/client/defaults/Defaults.go

src/client/defaults/resources/ca-cert.pem

src/client/defaults/resources/server

src/client/nexus-cli/Makefile

src/client/nexush/Makefile

src/server/consts/consts.go

src/server/nexus-server.go

src/server/paths/paths.go