=== Changed
- Added `listy.isiterable()`, `listy.iterate()`, and `listy.index()`.
- Added `stringy.remove()`, `stringy.haspattern()`, and `stringy.subtract()`.
- Added `filesys.Path` which is now the base of `File` and `Dir.`
- Added `filesys.countall()` and `filesys.walkall()`.
- Updates to `AuxlyError`, made it falsy for comparisons.