Implemented first draft of fix for TAPESTRY-1278 && TAPESTRY-1274. 

-) Added new "seedids" hidden form field parameter that contains current state of IdAllocator.
-) Refactored FormSupport to use IRequestCycle IdAllocator instance so that all components in the render are guaranteed a unique id.
-) Added toExternalForm and fromExternal to IdAllocator class.
-) Removed all usages of FormSupportFactory as that concept is no longer necessary. 
-) Fixed broken pom versions in VLIB/VlibBeans as a result of whoever upped the snapshot version not checking these sub-projects. 
-) Added utility class CompressedDataEncoder which works similar to how the pagedataencoder compressed and encodes page data state for inclusion in URLS or hidden form input fields. 
-) Made FormSupportImpl re-initialize the RequestCycle IdAllocator instance to the seeded id state that was originally encoded with the form being rewound to gurarantee consistent id state for form submissions.

git-svn-id: https://svn.apache.org/repos/asf/tapestry/tapestry4/branches/MultipleFormIDGeneration@611881 13f79535-47bb-0310-9956-ffa450edef68