All transformations relying on Shrink converted to generic SSA_TRANSFORM signature.
Generic SSA signature updated to accomodate functors that depend on RESTORE
Removed old signatures
Generic signature implemented for SSA2 passes
Generic signature for XML passes implemented
Generic signature for RSSA passes implemented.
Sources.cm modified to include scc-funs.sig
Merge pull request #10 from staniels/ssa-transform

Generic signatures for XML/SXML, SSA/SSA2, and RSSA transformation passes.