Some work on the natpair-ivars language.
Defined mylub to determine the lub
Merge branch 'natpair-ivars-updates'
Fix up LVarTraceScalable.  Compiles.
Add a version that EXPLICITLY forces the Pure LVar implementation
Start reorganizing stuff.
Merge branch 'master' of github.com:iu-parfunc/lvars
Export a few more things from LVarTracePure