* LogFile.cc (LogFile::exit): Don't print ending message after

	* LogFile.cc (LogFile::exit): Don't print ending message after
	successful elevation.
	* res.rc (IDS_ELEVATED): New string.
	* resource.h (IDS_ELEVATED): New string resource number.

	* LogFile.cc (LogFile::flushAll): New function to flush log all logging
	to files without exiting (as LogFile::exit does).
	* LogFile.h: Declare new method closeAll.
	* main.cc (NoAdminOption): Add new CLI options -B/--no-admin. This
	option allows the user to suppress privilege elevation (in tandem with
	"asInvoker" requestedExecutionLevel changes to exe manifests).
	(WinMain): check if setup run with Administrator privilege and if the
	NoAdminOption has not been specified, attempt to elevate privilege to an
	Administrator via WINAPI ShellExecuteEx().
	* setup.exe.manifest: Add requestedExecutionLevel of asInvoker to allow
	suppression of privilege elevation.
	* setup64.exe.manifest: Modify requestedExecutionLevel from
	requireAdministrator to asInvoker to allow suppression of privilege
	elevation. Continuity of privilege elevation attempt on startup is
	implemented by main.cc changes to WinMain().
	* win32.cc (NTSecurity::isRunAsAdmin): New function to allow main.cc to
	check if setup.exe has been run with privilege elevated to Administrator
	level.
	* win32.h: Declare new method isRunAsAdmin.