ZP-608 #comment moved StringStreamWrapper to lib/utils, in case of issues during wbxml decoding, include the wbxml data in the error log for easier debugging, added stand alone wbxml decoding tool

git-svn-id: https://z-push.org/svn/z-push/trunk@1948 b7dd7b3b-3a3c-0410-9da9-bee62a6cc5b5