feat(tracker/presets): new and tweaked presets from Reaby

The presets are also organized by their type into subfolders.

Closes #136

tracker/presets/LEAD/HappyLead.yml

@@ -0,0 +1,49 @@
+name: LEAD HappyLead
+numvoices: 4
+units:
+    - type: envelope
+      id: 163
+      parameters: {attack: 19, decay: 88, gain: 128, release: 57, stereo: 0, sustain: 80}
+    - type: envelope
+      id: 228
+      parameters: {attack: 35, decay: 75, gain: 127, release: 68, stereo: 0, sustain: 63}
+    - type: mulp
+      id: 229
+      parameters: {stereo: 0}
+    - type: oscillator
+      id: 164
+      parameters: {color: 65, detune: 56, gain: 64, lfo: 0, phase: 0, shape: 42, stereo: 0, transpose: 76, type: 1, unison: 2}
+    - type: add
+      id: 214
+      parameters: {stereo: 0}
+    - type: oscillator
+      id: 165
+      parameters: {color: 64, detune: 54, gain: 64, lfo: 0, phase: 0, shape: 48, stereo: 0, transpose: 88, type: 1, unison: 3}
+    - type: addp
+      id: 166
+      parameters: {stereo: 0}
+    - type: mulp
+      id: 167
+      parameters: {stereo: 0}
+    - type: filter
+      id: 217
+      parameters: {bandpass: 0, frequency: 91, highpass: 0, lowpass: 1, negbandpass: 0, neghighpass: 1, resonance: 128, stereo: 0}
+    - type: filter
+      id: 230
+      parameters: {bandpass: 1, frequency: 49, highpass: 0, lowpass: 0, negbandpass: 0, neghighpass: 1, resonance: 128, stereo: 0}
+    - type: pan
+      id: 168
+      parameters: {panning: 60, stereo: 0}
+    - type: delay
+      id: 169
+      parameters: {damp: 33, dry: 61, feedback: 78, notetracking: 0, pregain: 31, stereo: 1}
+      varargs: [12550, 24402, 21265, 32419]
+    - type: outaux
+      id: 172
+      parameters: {auxgain: 25, outgain: 38, stereo: 1}
+    - type: loadnote
+      id: 231
+      parameters: {stereo: 0}
+    - type: send
+      id: 232
+      parameters: {amount: 89, port: 0, sendpop: 1, stereo: 0, target: 230, unit: 0, voice: 0}