Use edb.prebuilt.json from emojibot2
Provide example usage
Update readme to reflect chanegs
Simplify code/directory structure
new file: .gitignore
modified: Emojipasta.go
modified: README.md
deleted: assets/emojis.json
new file: edb.prebuilt.json
new file: example/main.go
deleted: generator/generator.go
