zip downloading (#36)

allows installing from git

use a hashset

 add a package cache (#30)

<>=||~*x^ syntax (#28)

clean everything up a bit (#27)

make it fast (#25)

parallel updates (#24)

fix bug where `preload("./thing")` would become `preload("res://./thi…

…ng")` (#23)

init command (#21)

try to autodetect configfile (#20)