fix log verbosity
fix log verbosity

info by default
may be controlled by -v flag
 use -v=9 for full message logging

kswaldemar/rewind-viewer,kswaldemar/rewind-viewer,kswaldemar/rewind-viewer,kswaldemar/rewind-viewer,kswaldemar/rewind-viewer,kswaldemar/rewind-viewer,kswaldemar/rewind-viewer,kswaldemar/rewind-viewer