Add Application-Name to manifest

A Mac user reported "Application title was not found in manifest."
Oddly enough the documentation reports this as optional, but it seems
good to set it anyway.

http://docs.oracle.com/javase/7/docs/technotes/guides/jweb/security/manifest.html
Set strict jarsigner

The Fred build config already targets 1.6, so one should be able to use
Java 1.7 (which supports -strict to jarsigner) without issue.