[ANN] Xf 0.1.0 - Transform Functions

Back again with new toys after playing with Rambda in Javascript again, and
wanting to keep a few of the features for later.

Introducing Xf, or Transform Functions. The idea behind this one was to
emulate lenses from functional languages in Ruby in a pragmatic way with a
bit of a Ruby twist.

Deal with a lot of JSON and transforming it? Have no idea where the key is,
or even if it's in the same place? Xf is great with that, give it a shot!

Was tempted to add some of this to Qo, but the concerns were fairly
seperate.

Enjoy!

- baweaver