Added Go To Block/Class/Def Start/End Functions.  Added sorting to drscript/bookmarks dialog.  Added functions to run code from plugins in OnNew, OnClose, SaveFile, OpenFile.  Added Toggle Fold.  Added optional filename restrictions for check syntax on save.  Optional check indentation on open.  Bugfixes in indentation handling, and the find/replace dialog, plus a few other small fixes/tweaks.

I figured I'd get this out sooner rather than later (as always), on account of the new plugin functions.

Still a few things I want to fiddle with, but they can be worked in slowly.