recap

Hi,
I have modified a few things in recap:

- Changed name schema of log files (xxx_YYYYmmdd-HHMMSS.log)
- Re-implemented '-B' option
- Written 'recaplog' utility to clean old log files
- Configured command line options in /etc/recap

Could you please take a look at those, and possibly accept my pull request?
Thanks,

~Simone