only update sound if `update_sounds` is set - reindent
note that other api params can be specified.
Improve documentation of parameters

Clarify the description and add a more comprehensive example.
Merge pull request #11 from brycied00d/clarify-options

Improve documentation of parameters
remove tailing ,'s
Merge remote-tracking branch 'qbit/master'

Conflicts:
	lib/pushover.js