Log Message:
Update genshi to 0.6.1.

Version 0.6.1
http://svn.edgewall.org/repos/genshi/tags/0.6.1/
(Jan 27 2013, from branches/stable/0.6.x)

 * Security fix to enhance sanitizing of CSS in style attributes. Genshi's
   `HTMLSanitizer` disallows style attributes by default (this remains
   unchanged) and warns against such attacks in its documentation, but
   the provided CSS santizing is now less lacking (see #455).
 * Fix for error in how `HTMLFormFiller` would handle `textarea` elements if
   no value was not supplied form them.
 * The `HTMLFormFiller` now correctly handles check boxes and radio buttons
   with an empty `value` attribute.
 * Template `Context` objects now have a `.copy` method.
 * Added a simple `tox.ini` file for using tox to test against multiple
   verions of Python.
 * Fix for bug in `QName` comparison (see #413).
 * Fix for bug in handling of trailing events in match template matches
   (see #399).
 * Fix i18n namespace declaration in documentation (see #400).
 * Fix for bug in caching of events in serializers by no longer caching
   `(TEXT, Markup)` events (see #429).
 * Fix handling of `None` by `Markup.escape` in `_speedups.c` (see #439).
 * Fix handling of internal state by match templates (relevant when multiple
   templates match the same part of the stream, see #370).
 * Fix handling of multiple events between or on either side of start and end
   tags in translated messages (see #404).
 * Fix test failures caused by changes in HTMLParser in Python 2.7 (see #501).
 * Fix infinite loop in interplotation lexing that was introduced by a change
   in Python 2.7's tokenizer (see #540).
 * Fix handling of processing instructions without data (see #368).
 * Updated MANIFEST.in so as not to rely on build from Subersion 1.6.