improvements to examples/
got rid of GAS_const and GAS_merge!!!! hooray!
update to use Control.GArrow instead of GHC.HetMet.GArrow
GArrowSkeleton: add comment
Add "atomic" component during optimization
GArrowSkeleton: improve optimizations
move to new normalization-based optimizer, add GArrowSkeleton.beautify
very rudimentary support for feedback in GArrowTikZ
fix types of GAS_loop{l,r}
GArrowSkeleton: add some more optimization cases
update demo for new more-efficient encoding of functions
add GArrowSkeleton