Rebuild dist.
Adjust the docs of `_.forEach`, `_.after`, `_.before`, `_.debounce`, & `_.throttle`. [closes #710] [ci skip]
Memoized safe for objects
Initial cache impl
_.memoize using new Cache constructor
Merge remote-tracking branch 'upstream/master' into object-safe-memoize
Tidy up + changes following comments
Merge pull request #716 from jabclab/object-safe-memoize

Add `_.memoize.Cache` to allow using ES6 Map/WeakMap.