Embedding feature patch 1: add zipFiles and unzipToDir to support

Embedding feature patch 1: add zipFiles and unzipToDir to support
	* src/support/lyxlib.h: add makedir(), used by unzipToDir
	* src/support/filetools.[h|cpp]: add zipFiles() and unzipToDir()
	* src/support/mkdir.cpp: add makedir() and mymkdir(char*).
	* src/support/minizip: add zlib-1.2.3/contrib/minizip files to lyx svn
	* src/support/minizip/iowin32.h
	* src/support/minizip/ioapi.c
	* src/support/minizip/zip.c
	* src/support/minizip/unzip.c
	* src/support/minizip/crypt.h
	* src/support/minizip/ioapi.h
	* src/support/minizip/zip.h
	* src/support/minizip/unzip.h
	* src/support/minizip/iowin32.c
	* development/scons/scons_manifest.py: adjust scons
	* development/scons/SConstruct

git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@19692 a592a061-630c-0410-9148-cb99ea01b6c8