Added JavaMail API and Added Server Functionality for Emailing

I added the JavaMail API to our external folder and classpath and
created a class called ServerImpl to handle server processes such as
logging in users and sending email messages. 

I also added two new config files called logging.properties and
messenger.properties to make changing logging and email settings easier
You guys shouldn't need to modifiy these unless you want to change
logging levels or change how emails are sent (such as if you want to
change the sender address).
Merge branch 'master' of https://github.com/nickAroberts/cap-4710-project.git