Add support for RpcTokens, which, if set, are sent with each RPCRequest to
the server. RpcTokens can be used to implement XSRF protection for GWT RPC
calls.

Review at http://gwt-code-reviews.appspot.com/1107801


git-svn-id: https://google-web-toolkit.googlecode.com/svn/trunk@9289 8db76d5a-ed1c-0410-87a9-c151d255dfc7
27 files changed