Revert "Patch up variable importance handling."

This reverts commit 44ae62b9b56c546bdce92b3cb93be06fdc06d706.
Revert "corrected index used in shuffled OOB array for VI"

This reverts commit c02fedb2eb7cf86d848af07aee2cb1e1c7d603fe.
Revert "playing with effects of different enum mappings"

This reverts commit 6f1486cb7c39b5efb4293b691a6d45b6401e2ea3.
Revert "didn't push this"

This reverts commit 3a63bcb750fa2b15bcea83fb7ef8024f8cc54339.
Revert "a little better handling of glm2 grid"

This reverts commit 5346bf05f9fc430a81fd01ac468d4e32a78679ec.
Revert "some test.0xdata fixs"

This reverts commit b85c98a4ddf704ff9a50758593f267b5b53b78f9.
Revert "Improve error message."

This reverts commit 08f102b29753f0f924795a6c1942cc4ba7ccc522.