Merge pull request #6 from mcav/pop3

Bug 918192 - POP3 Support. Version bump to 0.0.7. r=asuth
Bug 918192 - POP3 Support [period stuffing]. Version bump to 0.0.8. r=asuth
Merge pull request #7 from mcav/period-stuffing

Add period-stuffing to pop3d.js. r=asuth
Add additional checks for when no messages exist or the wrong message is requested.