Create directory if it does not exist + small layout changes.
Java 7 does not respect system property "sun.awt.exception.handler". Use: Thread.currentThread().setUncaughtExceptionHandler(...)
Added menu entry for sample size calculations and disabled the whole analysis entry for now.
Added GPL disclaimer to About dialog.
Added Dialog showing GPL license and disclaimer.
New set of properties: haveReadGPL, askForSaveDir and saveDir.
Saving archive files.