Modified Email sending a bit, added Save Preferences button to Setup, updated Gitignore

-Made Email create a new Session every time it sends an email (instead of getting default instance)
-Added Save Preferences button to Setup
-Made program detect if autoStart was enabled for command-line interface
--Does not prompt for settings if autoStart is specified
-Condensed some code in Paxsite.java and Showclix.java
-Added more error-handling to Paxsite.java and Showclix.java
-Changed version to 1.7.5.2