Better scale

- switch on dev env
- fix time scale with wrong alignment
Change scale in stats viewer

- change creation of scale TODO: have a real value scale
- add reset action in viewer
Set cron and script for prod env

- grab stats set on aviator root's crontab
- change launch scripts
- adapt display_stats to have better visualisation of server stats
- fix icon pb in statsviewer
Merge branch 'feature/better_stats_time_scale' into develop
Remove debug print