Added platform specific package creation.

Added platform specific package creation.
Removed launcher from toolkit jar, they still exists on workspace src and classpath.
Removed excess sources from demo.
Removed tests.

<!-- Package creation - - - - - - - - - - - - - - - - - - - - - - - - -

	When creating release use only "package-*" targets:
	package-all-platforms, package-windows, package-linux or package-mac.

	NOTE: This build script requires directories named build/gwt/(gwt|linux|windows|mac) .
	It's best that you unpack platform specific binaries under linux, windows and mac directories and
	then depending on your platform link build/gwt/gwt -> build/gwt/<my_platform>
	build/gwt/gwt is used to compile WebContent/ITMILL/widgetsets (depends on your platform, hence we use "gwt") and
	build/gwt/(linux|windows|mac) are used when creating platform specific release ZIP/TGZ packages.
-->

svn changeset:2552/svn branch:trunk