1. Updates all requests to use POST instead of GET. 2. Use JSON to encode requests instead of a custom solution. Patch by: amitmanjhi Review by: rjrjr (desk review and TBR) git-svn-id: https://google-web-toolkit.googlecode.com/svn/trunk@7762 8db76d5a-ed1c-0410-87a9-c151d255dfc7