Audacity 0.91

What's new in this version:

- New floating tool palette with four tools (selection, sliding, zooming, and envelope editing) plus play and stop buttons
- Playback now mixes tracks, and you can work with the document while listening.The stop button works.
- Rewritten file handling functions. The main view is no longer dependent on the wxWindows DocView classes, so we can handle files ourselves. The project file format is now text-based for easy debugging. Eventually it will probably move to XML.
- Improved handling of wave tracks: as before, the data is stored in blocks, but now, the blocks are correctly limited to betweek n and 2n bytes each (for some n), which guarantees editing operations always take the same amount of time, while also ensuring that projects don't get more fragmented over time.
- Rewritten user interface code.The shades of gray are taken from the OS, and the project window has been redesigned to have more consistent layout across all platforms.
- Selecting "Open" now does the smart thing, opening a project if you give it a project, or importing a WAV file if you give it that.
- Flashing cursor indicates the current editing position
- Much improved ruler - besides looking nicer, the ruler now displays the selection and the cursor.
- The zoom tool centers on the cursor so you can zoom into wherever you are.
- Zoom menu added, and includes "Fit to Window" option
- Frequency plot window
- Improved MP3 importing
- Lots of bug fixes