### Add GDB Helper Script

A new [Debugging with GDB](gdb.md) document which is linked under the
"General Information" heading in the side-bar provides information on
how to debug C/C++ code in an IOC running on a workstation OS.

This release added a GDB helper script that pretty-prints some of the
common database types.
Tested with GDB 16.3.
Compatible with python 3.