The PARAFORMAT structure has a bit in wEffects to indicate whether the
paragraph is a table or not, so this should be used instead of a private
bTable value, since this structure can be retrieved with EM_GETPARAFORMAT.

Move those things out of the state table.

For now the atifs selection sticks to the old rules, thus it is bound to
the available and selected shader capabilities. We may want to change that
in the future.

Some fragment pipeline implementations may want to register their own
texture transform handlers.