bug fixe: bad handling negative duration values
Add PG devel version support.
bug fix #19: On nex psutil version (> 0.7.0) psutil.error module does not exist anymore, must use directly psutil.NoSuchProcess and psutil.AccessDenied
fix #22: Handle beta versions.
New version: 1.0.2
[FIX] avoid crashing if q['duration'] is None
Merge pull request #23 from gurneyalex/master

Sometimes crash with a TypeError in get_duration
try to use a UNIX Socket connection if host is localhost

This allows to avoid using the PGPASSWORD environment variable
or a .pgpass file if ident / peer authentication is supported
Add some info about the 'no-man' install option to the README file.
Merge pull request #24 from gurneyalex/pg_auth_ident

try to use a UNIX Socket connection if host is localhost
Merge pull request #25 from garaud/man_page_readme

Add some info about the 'no-man' install option to the README file.
Cosmetic fix in README.md file
Cosmetic fix in README.md file 2
Bug fix #20: Creation of a customized OptionParser for catching option errors
New dev version.