next version
introduce `impl` package
new api + fix compilation but everything fails
no need for quasiquote compat any more
first bits of new implementation that actually work
provide and compile foldLeft entryPoint
fix map hygiene
implement sum
`filter` implementation
implemented `reduce`
implement `flatMap`
implemented `size` (by counting)
implement `min` and `max` in terms of Reduce
support adding extra inits from generators
create dontfold annotations while extracting
refactoring: split up code into several files, get rid of legacy
add some scalacheck tests
create a subproject for tests
automatically generate tests
array => coll