Keep size information for function arguments.
Made (?) infix. Closes #46.

Inspired by <http://www.haskell.org/haskellwiki/Case#infix_operator>
Added a make command to easily type check all tutorial files
Reenabling optimization rules for `Bind`
Merge pull request #1 from emilaxelsson/arg-sizes

Reenabling optimization rules for `Bind`
Added `scan` to Vector.Internal
Merge pull request #47 from pjonsson/arg-sizes

Keep size information for function arguments

Conflicts:
	src/Feldspar/Core/Constructs/Loop.hs
	src/Feldspar/Core/Constructs/Mutable.hs
	src/Feldspar/Core/Constructs/Par.hs
Update range propagation test case