Start step4 example
Doxygen updates for example/steps
Doc updates on hw32.h
Use step1 as a starting point for step2
Have p4estindent find indent installed by Homebrew

On OS X the package manager Homebrew installs gnu-indent as gindent.
This change allows the p4estindent script to find gindent.
Add functions for reading an ABAQUS .inp

Both GMSH and Cubit can generate ABAQUS .inp files.  These functions
presented here read the .inp files a build the associated connectivity.
Have step2 read an .inp file