Move soundfont, playback and midi implementation into a separate project

[klesun]

I wanna separate /entry/compose.html and /entry/main.html cuz commit messages start to become ambiguous. Same problem with issues.

Plus i got some general use functions that i just feel bad to copypaste to the mokona_game project.

Plus, the soundfont part is obviously the only reusable aka the most useful part of my project and sharing it with ppl must be a good thing.

[klesun]

So the current project should be split into three:

• Player (midi files storage, playback)
• Editor (composing)
• Lib (soundfont player implementation and the rest shared stuff)