Bugfix in EmailService, Email Tester can save distribution list
EmailService.java:
-fixed bug where empty recipients list would generate exception, sendEmailMessage() now checks that all arguments are not null, not empty

TempMonitor.java:
-widget now gracefully ages out temperature data (temperature fades, date reading becomes increasingly red)

SimpleHttpServer.java:
-settings for twitter now treated as passwords (displayed as *)

EmailTester.java:
-added ability to save recipients list to database, reads list upon creation/widget building