view-source feature, from Bo Peng <ben.bob@gmail.com>

view-source feature, from Bo Peng <ben.bob@gmail.com>
	* src/buffer.h buffer.C - getSourceCode()
	* src/lyxfunc.C -  open view-source dialog
	* src/text3.C - change LFUN_MOUSE_RELEASE
	* src/output_linuxdoc.C, src/output_docbook.C, src/output_latex.C
		- intercept output
	* src/outputparams.h, outputparams.C - add par_begin, par_end, dryrun
	* src/insets/insetgraphics.C  - add dryrun mode of file conversion
	* lib/ui/stdmenus.ui - add view-source menu item under view
	* Add view-source dialog, add
	    src/frontends/qt2/QViewSourceDialog.h, QViewSource.C, QViewSource.h, QViewSourceDialog.C
	    src/frontends/qt2/ui/QViewSourceDialogBase.ui
	    src/frontends/controllers/ControlViewSource.h ControlViewSource.C
	  modify
	    src/frontends/qt2/Makefile.dialogs, Makefile.am, Dialogs.C,
	    src/frontends/controllers/Makefile.am, po.POTFILES.in

git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@13610 a592a061-630c-0410-9148-cb99ea01b6c8