Update README.txt to make it ready for ZF 1.6.0 RC2 release. Copied from the release-1.6 branch.
Update README.txt to make it ready for ZF 1.6.0 RC2 release. Copied from the release-1.6 branch.

git-svn-id: abaeb2b3ba5a94ed391a9405ad7d63d0414021c9@10798 44c647ce-9c0f-0410-b52a-842ac1e357ba

sandsmedia/zf,sandsmedia/zf,grzana12/ZendFramework,sandsmedia/zf,grzana12/ZendFramework,grzana12/ZendFramework,grzana12/ZendFramework