Copyright update to 2016

Code formatting cleanup

Round bgwriter numbers to 3 decimal places

Allow passing database name as the first parameter

Update pg_stat_activity based scripts for 9.2 changes.

Update old-age script to show the age itself

Update perf scripts to use environment variables.

Add archive_stat utility.

Add client count script similar to Munin's approach

Refuse to overwite existing archive file.

Populate with initial rough script set

Initial commit