Adds playable instruments, IDropped, IHandSelected and IHandDese… (#368)

* Instrument test.

* Midi stuff

* Some more work

* This actually works now!

* update

* Midi Audio works!

* Lots of stuff, and cool interfaces for items

* Update

* Fix a few things

* It just works

* Move textures to another folder, remove placeholder description from instruments

* Fix warning

* Use renderer enum

* Instruments now use DisposeRenderer method, and send MidiEvents as they receive them. Deletes InstrumentSystem whoo.

* Fix incorrect sprite paths

* Instruments take midi file size check into account when enabling/disabling midi playback buttons

* Fix crash when pressing drop on empty hand.

* Use new renderer return values for midi/input

* Xylophones are no longer handheld instruments, fix their sprites.

* Use new API

* Remove nfluidsynth from solution

* Timing information

* Use IGameTiming.CurTime for timestamps instead

Resources/Textures/Objects/Instruments/musician.rsi/meta.json

@@ -0,0 +1 @@
+{"version": 1, "size": {"x": 32, "y": 32}, "license": "CC-BY-SA-3.0", "copyright": "https://github.com/vgstation-coders/vgstation13 at 8d9c91e19cb52713c7f7f1804c2b6f7203f8d331", "states": [{"name": "accordion", "directions": 1, "delays": [[1.0]]}, {"name": "bike_horn", "directions": 1, "delays": [[1.0]]}, {"name": "drum", "directions": 1, "delays": [[1.0]]}, {"name": "drum_bongo", "directions": 1, "delays": [[1.0]]}, {"name": "drum_makeshift", "directions": 1, "delays": [[1.0]]}, {"name": "glockenspiel", "directions": 1, "delays": [[1.0]]}, {"name": "guitar", "directions": 1, "delays": [[1.0]]}, {"name": "harmonica", "directions": 1, "delays": [[1.0]]}, {"name": "minimoog", "directions": 4, "delays": [[1.0], [1.0], [1.0], [1.0]]}, {"name": "minimoog-broken", "directions": 4, "delays": [[1.0], [1.0], [1.0], [1.0]]}, {"name": "piano", "directions": 4, "delays": [[1.0], [1.0], [1.0], [1.0]]}, {"name": "piano-broken", "directions": 4, "delays": [[1.0], [1.0], [1.0], [1.0]]}, {"name": "recorder", "directions": 1, "delays": [[1.0]]}, {"name": "saxophone", "directions": 1, "delays": [[1.0]]}, {"name": "trombone", "directions": 1, "delays": [[1.0]]}, {"name": "violin", "directions": 1, "delays": [[1.0]]}, {"name": "xylophone", "directions": 4, "delays": [[1.0], [1.0], [1.0], [1.0]]}, {"name": "xylophone-broken", "directions": 4, "delays": [[1.0], [1.0], [1.0], [1.0]]}]}