LyX file-format changes
-----------------------
+2007-05-14 Martin Vermeer <martin.vermeer@tkk.fi>
+ * format incremented to 270: support beamer \alert, \structure
+
2007-05-08 Bo Peng <ben.bob@gmail.com>
* format incremented to 269: add listings support
- add preamble flag \listings_params, e.g. \listings_params "language=Python,float"