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
I mean to run the "info" command on a pool file which is not currently used by any other process in order to keep meta-data in consistent state. The "info" command opens a pool file in RO mode but user should be aware that there is no inter process synchronization mechanism for pool files.