Accuracy Improvements v2

Length-counter update function wasn't called for the wave channel in the previous "accuracy" release! Oops!

Accuracy Improvements

Patch release with most recent accuracy fixes.

Oscilloscope

Now includes an X11 Oscilloscope accessible via the o key.
Also an improved debug display with colors via the -dd command line argument.

UI improvements, plain ALSA audio

I had neglected to create a release for some time, this one covers quite a lot from the previous.

New keys:
c - view vertical scrolling note chart thing
v - show volume bars
enter - go to a specific track

Now outputs audio with plain ALSA, which integrates pretty nicely with the main poll() loop and doesn't need threads. (The less complexity the better!)

Volume is persisted in the new $XDG_CONFIG_DIR/minigbsrc config file.

1.2: Wave channel improvement + note display fix.

Wave channel sounds better.
Add speed changing with [, ], backspace.

1.1

Fixes issues when trying to play notes with a higher frequency than the sample rate.

1.0

Includes binaries for i386 + x86_64