Make AstonSettings better.
Updated goals, fixed bugs & cleaned up DB code.
Craig method finished (?), DB flags control DB update, and functional delete keys in FileTable.
Updated TODO, added active_traces interface to Datafile, and fixed misc bugs.
Refactored peak finding code; can integrate user selected peaks now.  Menu options for Spec plotting.
New Spectrum plotting code.
Fixes for Event peak finding & Isodat/Conflo timing.