From: David Friend <dfriend@atlsci.atlsci.com>

Here are the latest changes to the INSTALL instructions.

The main changes are:
  - Step 5, on flex
  - Steps 18 and 19, on regression tests
  - Step 22 c) on starting postmaster on bootup on FreeBSD
  - Added porting notes for SPARC/Linux at end.

If there is time, Thomas should review step 19.