Ci

Resolve "142-Implement_CA_cert"

See merge request !18

Resolve "Configurable MaxMessageSize"

See merge request !17

# Conflicts:
#   config.yaml.sample
#   handler/generate_keypair.go
#   handler/handler.go
#   handler/revoke.go
#   main.go
#   server/server.go

Resolve "142-Implement_CA_cert"

See merge request !14