add /pushtest, document, make tokens config parameters, configurable sound etc
Updated README.md - better documentation of functionality and installation pointers
Merge branch 'donnex-master'

Option to ignore hilights from specified channels.
Merge branch 'master' of git://github.com/palepurple/irssi-pushover

Conflicts:
	pushover.pl

Removed the default pushover apptoken, the user needs to provide their
own.