Radium 7.1.89 released

[Kjetil Matheussen]

Most work this time has been spent working on converting notes to the
new data format. Playback seems to work perfectly now, with the new
data format, so there shouldn't be much work left before it's
finished. This is necessary in order to move notes without having to
temporarily pause the player (which we do a lot right now), and for
future work such as replacing OpenGL with a more modern graphics
library.

However, that work is not included in this release (since it's
finished). Most exciting news for this release is a new demo-song by
mward25 called "Test Automation", demonstrating effects in Radium,
changing one effect at a time per block to easily hear changes.

Changes 7.1.88 -> 7.1.89:
* Demo songs: Added "Test Automation" made by mward25.
* Sequencer: Fix moving seqblocks (and probably other
things) not working when sequencer is inside the
mixer and the mixer is displayed in its own window.
* Ladspa plugins: More detailed progress message
during program initialization. May help track down
why it sometimes takes so long time on Windows.