Added - file/directory size checker - `is_writable` function
0.4.5
Changed - If argument to callability checker is a file, require executability; if it's a folder, it's not callable. Fixed - Populate intended field in error message for bad argument to callability checker.
0.4.4
Added - Command callability checker
0.4.3
Changed - To avoid implicitly wrapping `input()` in `eval`, never use `2to3`.
0.4.2
Fixed - More robust handling of terminal interaction in `query_yes_no`