added support for /etc/apcupsd/change, which is a script designed to email someone when the UPS battery needs to be changed. Added two defaulted paramters to the apcupsd class, admin (the email address of the admin to receive the mail (defaults to root)), and mail (the program used to send the email (defaults to mail)).
Merge pull request #1 from mitct02/master

added support for /etc/apcupsd/changeme, which is a script designed to ema...