Support any patch release of Cake for the current major-minor version

[AdmiringWorm]

Instead of forcing an exact version of Cake that the user needs to use, I think it would be beneficial to only force the Major+Minor version of Cake.
Allowing the user to use any patch release of cake that he/she wishes (once Cake reached 1.0.0, this could be made to only force the major version).

To make these easier to update between every release of Cake.Recipe, I would also recommend to dogfood the recipe when building it, and use the Cake version that Cake.Recipe was created with to restrict builds depending on Cake.Recipe automatically.