file upload
support upload
add dependencies for multipart requests
Merge branch 'alex_file_handler' of git@github.com:xwic/appkit.git into appkit_5.1

Conflicts:
	de.xwic.appkit.core/src/de/xwic/appkit/core/remote/server/RemoteDataAccessServlet.java
	de.xwic.appkit.core/src/de/xwic/appkit/core/remote/server/RemoteFileAccessHandler.java