Begin the process of adding NIST's STEP Class Libraries code to the BRL-CAD tree.  This first commit sets up the build logic for a src/other/step subconfigure  and imports a step tree which is the original NIST STEP 3.2 release, minus some temporary files and an old file in src/cldai that causes conflicts on case insensitive filesystems.  This is not expected to be a buildable configuration - it is included to preserve the original state of the libraries in case it is needed.
Update STEP code to version from http://www.statik.tu-cottbus.de/fileadmin/project_dth/scl/  This configuration is closer to building on many platforms but will need special options to configure not supplied by default.  As this is not the final form the libraries will take in the BRL-CAD tree no attempt is made to work with this build structure.  One more commit will be needed for a file renaming but after that point modifications will be due to BRL-CAD developers.  (Note - two files named src/fedex_plus/.pure and src/express/.Sanitize are added here that were also present in the original distribution but were missed.)
Add back in the properly named sdaiDaObject.cc
Start setting up standard README, COPYING, NEWS, etc. files
Clear out arch_template and bin
More inching forward in STEP
Add step/misc directory
Add some Makefile.am files to various directories
Merge in most of the changes made thus far.  Probably won't build yet as new Makefile.am stuff is untested, but getting close
Stuff the other dirs behind EXTRA_DIST for now, and bring them out later if they should be elsewhere.
Put cldai headers back where they came from
Put cleditor headers back where they came from
Put clstepcore headers back where they came from
Put clutils headers back where they came from
Add includes needed for original header locations in clstepcore
Add includes needed for original header locations in cleditor
Add includes needed for original header locations in cldai
Whoops - fix noinst_HEADERS in exppp
Add the clstepcore headers to Makefile.am as noinst for now.
Ahem - as I was trying to do before the power went out, add in conf so step configure has some version numbers to work with.