Release v0.0.4

Add dynamic deployment of pinger and daemon.

# Install daemon into instana-agent namespace
envcheckctl -daemon
# Install daemon into custom namespace
envcheckctl -daemon daemonns=my-custom-ns
# View logs from daemon
kubectl logs -n instana-agent -l app.kubernetes.io/name=envchecker -f

# Install ping client into default namespace
envcheckctl -ping
# Install ping client into custom namespace
envcheckctl -ping pingns=my-custom-ns
# view logs from ping client
kubectl logs -l app.kubernetes.io/name=pinger -f