jutebag.commands used to be an object with command names as the keys, until
e69f7dfc90ffcbcf82f313de863be47590861f64 changed jutebag.commands from an
object to a sorted array.
Use an appropriate lookup, now that jutebag.commands is an array.
Also, make bin/jutebag executable, so it can be run directly, without
explicitly running node while developing.
jutebag.commands used to be an object with command names as the keys, until e69f7dfc90ffcbcf82f313de863be47590861f64 changed jutebag.commands from an object to a sorted array.
Use an appropriate lookup, now that jutebag.commands is an array.
Also, make bin/jutebag executable, so it can be run directly, without explicitly running node while developing.