Added multiple new actions, most of them will use the system default implementation but can be forced to use a specific CLSID or IShellFolder implementation.
- /shgfi (SHGetFileInfo)
- /assocq (IQueryAssociations)
- /shellexec (ShellExecuteEx on pidl)
- /dumpmenu (Dumps the HMENU of a IContextMenu with its menu ids and verbs)
Added /explorerinstance as a new wait mode and made it the default. All the other wait modes are hacks that just works around bugs in ROS.
