Scons windows installer integration:

Scons windows installer integration:
	* INSTALL.Win32: add instructin of building windows bundle installer
	* development/scons/SConstruct: add bundle and bundle_dir option
	* development/scons/scons_utils.py: handle bundle building
	* development/Win32/packaging/installer/lyx.nsi:
		allow specify bundle .exe name from command line
	* development/Win32/packaging/installer/settings.user.nsh:
		allow specify bundle directory from command line
	* development/Win32/packaging/installer/components/external.nsh:
		get files from bundle directory
	* development/Win32/packaging/installer/settings.nsh
		update miktex version (link needs to be updated as well?)

git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@17081 a592a061-630c-0410-9148-cb99ea01b6c8