Add grab bag of thoughts
Add some thoughts
Initial integration of foldable
Add test for fold
Fix library syntax
Add tests for collect and map
Fix filter and reject logic

Add regression test
Add test for reject
Add test for concat
Fix take logic and add regression test
Fix yield_next_ipair logic, add test for zip_with
Fix chunk logic
Fix chunk logic around last chunk

(There will always be one).
Add harvest() and test
Remove unneeded reference to reject
Add folds and test
Update lettersmith to use foldable
Update file_utils to use foldable

Update comment
Update drafts to use foldable
Update meta to use foldable