tools: pmempool utility

- pmempool utility with the following commands:
-- create - creating pool files
-- info - parsing pool files
-- dump - dumping data from pool files
-- check - checking and repairing pool files
- update scripts for creating packages
- bash completion script
- manual pages and README file
how do we get a pool hdr zeroed out? Also, if it is zeroed wouldn't that be an error if a repair isn't requested?