changed variable names
fixes the revision of r2l variable names
Merge pull request #1127 from anitzkin/schemequestionrules

changed variable names
Remove TrueLink FalseLink per Nil.

These are unused and un-needed.
Remove some non-existant atom types
Remove more obviously old, dead link types
Remove another non-existant type
Remove more dead code
Merge pull request #1134 from linas/false

Remove TrueLink, FalseLink
Remove dead NMXML code
Remove the dead nmxml unit tests too