Clarify comment and ifdef for vpr compiler-specific config.
Handle newer builds of cppdom better.
Ported updates to cmake find scripts
Sonix plugins (presumably when built separately) need NO_SELF_REGISTER defined.

h/t @godbyk

Progress on #13.
A little useful debugging print.
Use vrjugglersuit_set_project_version_vars(*) to handle *_VERSION_DOT and *_USE_VERSIONING

Should pretty much finish #13.
Tweek never uses these defines anywhere, get rid of the clutter.
Add a small embellishment to the version string configured in.
Perform configure checks for al/alut library variations.

h/t to @godbyk

Progress on #13
Add some more helpful messages.