Update versions for 4.1.0.rc1
Revert "Update versions for 4.1.0.rc1" -- old format for versions!

This reverts commit 211ec1f3c2ebac301655870e25a97ca4d6f7b746.
Update versions for 4.1.0.rc1 (using new format)
Pointing README links to 4-1-stable [ci skip]
`rails new --edge` should use the '4-1-stable' branch

See 14ef77ba