Add support for listings package. Two listings command \lstinline, \lstinputlisting...

Add support for listings package. Two listings command \lstinline, \lstinputlisting and an environment \lstlisting are supported, along with preamble \lstset. \lstinputlisting is implemented through Include dialog, and the other two are implemented with a new inset listings, along with its dialog.
	* src/LyXAction.cpp: listing-insert action
	* src/insets/Inset.h,cpp: LISTINGS_CODE
	* src/insets/InsetInclude.cpp: handle \lstinputlisting
	* src/insets/InsetListings.h,cpp: new listings inset
	* src/insets/InsetListingsParams.h,cpp: parameters from listings package
	* src/insets/InsetCommandParams.h,cpp: handle lstinputlisting option
	* src/Bidi.cpp: handle LISTINGS_CODE
	* src/frontends/qt4/ui/TextLayoutUi.ui: update UI
	* src/frontends/qt4/ui/ListingsUi.ui: new dialog
	* src/frontends/qt4/ui/IncludeUi.ui: update UI
	* src/frontends/qt4/QInclude.h,cpp: add lstinputlisting
	* src/frontends/qt4/QDocument.h,cpp: add textedit for preamble listings_params
	* src/frontends/qt4/QListings.h,cpp: new listings inset
	* src/frontends/qt4/Dialogs.cpp: new listings dialog
	* src/frontends/controllers/ControlInclude.h,cpp: add lstinputlisting
	* src/frontends/controllers/ControlListings.h,cpp: new listings inset
	* src/LyXFunc.cpp: handle LISTING_CODE
	* src/Paragraph.cpp: handle LISTING_CODE
	* src/factory.cpp: new listings inset
	* src/CutAndPaste.cpp: handle LISTINGS_CODE
	* src/LaTeXFeatures.cpp: require listings
	* src/Text3.cpp: Handle LISTINGS_CODE
	* src/lfuns.h: add LFUN_LISTING_INSERT
	* src/Buffer.cpp: change lyx file format to 269
	* src/BufferParams.h,cpp: add listings_params to preamble
	* lib/lyx2lyx/LyX.py: lyx2lyx
	* lib/lyx2lyx/lyx_1_5.py: lyx2lyx
	* lib/ui/stdmenus.inc: new menu item (no shortcut!)
	* src/insets/Makefile.am: update autotools
	* src/frontends/controllers/Makefile.am
	* src/frontends/qt4/Makefile.dialogs
	* src/frontends/qt4/Makefile.am
	* po/POTFILES.in: a few more translatable files.
	* development/scons/scons_manifest.py: scons build system
	* development/FORMAT: document format changes

git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@18243 a592a061-630c-0410-9148-cb99ea01b6c8