This is a simple wrapper around net.connect that listens for events from
acpid and emits them for further processing.
var acpi = require('acpi')
var client = acpi({socket: '/var/run/acpid.socket'})
client.on('battery', function(battery) {
console.log('battery acpi event on %s', battery)
})
client.on('ac_adapter', function(adapter) {
console.log('ac_adapter acpi event on %s', adapter)
})