Add NetBSD MI atomic_ops support.
Based on PR pkg/48608 by Izumi Tsutsui.
Update py-flask-assets to 0.9.

0.9 (2014-02-20)
    This release is compatible with webassets 0.9.
    flask-assets now support Python 3, and drops support for Python 2.5.

    - Support for Flask-S3 (Erik Taubeneck).
    - Support latest Flask-Script (Chris Hacken).
Update py-flask-script to 0.6.7.

Version 0.6.7
-----------------

Released on February 16, 2014

- Expose app instance in a command commands (manage.app). #83
- Show full help for submanagers if called without arguments. #85
- Fix ShowUrls command conflict.  #88
Updated www/py-flask-assets to 0.9.
Updated www/py-flask-script to 0.6.7.
Changes 20140303:
Bug fixes.
Enabled OpenCL for Darwin.
Fix building with Clang.
Removed patches/patch-ak
Updated multimedia/x264-devel to 20140303