[Python-ideas] Make gettext support direct PO files input

[Masklinn]

* The standard Python distribution provides an msgfmt tool able to
  compile PO files to MO files.
* The gettext module only looks for MO files.

This leads to 2 questions:
* Why isn't the msgfmt behavior available programmatically from the stdlib
  even though all the pieces seem present? (as far as I can see,
  everything is implemented in msgfmt directly)
* Why can't gettext use PO files directly, but requires separately
  generating MO files?