Improve scripts. Add new functions needed by code which is commited soon.
- Add new port 'subcalc' - Add userland tools 'tr' and 'wc'
Create missing directory /var/cron/tabs
Remove useless php wrapper.
Modify file permissions.
Improve code.
Add cron script to global struct.
Add 'cron' rc init script.
Modify scripts.
Remove ushare php wrapper.
