ADDED:
* `stringsx` package
** `stringsx.Indent()`, to indent/prefix multiline strings
** `stringsx.Redact()`, to mask strings
** `stringsx.TrimLines()`, like strings.TrimSpace() but multiline
** `stringsx.TrimSpaceLeft()`, like strings.TrimSpace() but only to the
left of a string.
** `stringsx.TrimSpaceRight()`, like strings.TrimSpace() but only to the
right of a string.
ADD:
* `iox` subpackage
FIX:
* `logging` now has a way to return logWritier directly
* added significant `io.*` interface compat to logWriter -- allowing a `logging.Logger` to essentially be used for a large amount of io interaction in other libraries.
