WIP - Electron builder work

[jakejarrett]

electron-builder Support

Why?

• AppImage support
• snap support (deploy to snapcraft with travisCI in the future)
• Can work with the AUR Soundnode maintainer to get automated deployments running from soundnode repo itself

TODO

Everything (it doesn't build yet!)

• [ ] Ensure builds output to dist not release
• [ ] Build the app (w/ icon etc)
• [ ] Build snap artifact
• [ ] Build AppImage artifact
• [ ] Investigate pacman build
• [ ] Build out CI for Linux builds

Fixes / Addresses

#1089 #1079 #1044 #1075 (And the many many other ubuntu deb issues)