Added option to skip password rendering.

This feature is useful for websites that do not wish to return forms with
pre-filled passwords, which might be appropriate in security-conscious websites
and applications.

A small user experience consideration, though, make sure you do as much
error-handling as possible before submitting forms, to prevent having a user
fill out their password over and over again.
Run 2to3 except fixer; compatible with Py 2.6.
Run 2to3 import fixer; compatible with Py 2.6.
Updated helptext for skip_passwords to make it's function clearer
Added tests for skip_passwords option
Merge pull request #36 from geonetix/master

Password-skip option in render
add Serbian translation
Merge pull request #38 from ninchica/master

Add Serbian translation
Merge branch 'master' of github.com:formencode/formencode into python3.3
Remove msgfmt.py; should be existant in tool directory via python-demo