M4 release requires Ext Lib

Adds:

• xsp.openlog.suppressStackTrace to suppress stack trace from Event logs.
• Capturing NotesException and java.io.IOException classes in SSJS errors.
• try/catch to ensure any other classes not identified are still caught.

Note: you no longer need the XPages OpenLog Logger if you have OpenNTF Domino API or OpenNTF Essentials installed. Just enable org.openntf.domino.XspLibrary for the relevant NSF and, if you use the static OpenLogItem class in Java, change it to use XspOpenLogUtil instead. That utility class (better practice) has the main methods, but also has a getOpenLogItem() method to get a handle on an instance of the OpenLogItem class.