Keep recursing after the first simplification to simplify subexpressions.
Simplify save (materialize ..).
Merge pull request #125 from pjonsson/simplify-more

Simplify untyped expressions a bit more.
Changed "monotonic" to "increases"/"decreases"
"Monotonic" is not the right term, but I don't know what the proper term is.
"Increasing"/"decreasing" seems to mean the same as "monotonic", so I chose
"increases"/"decreases" to mean that the function *-creases an argument.
Renamed Creases to Cumulative
Reorder entries in cabal file

Reorder the modules in the cabal file to make sure that `cabal repl` ends
up in `Feldspar`.
Simplify let (save e1) e2 into let e1 e2.
Simplify save e => e.
Merge pull request #127 from pjonsson/simplify-work

Simplify save.
Tweak the show instance for UntypedFeldF.
Allow inlining of linear(ish) expressions.
Optimize tuple selections.
Remove redundant parentheses.
Merge pull request #128 from pjonsson/more-simplification

More simplification