(#60) New interpolation methods to math library. Include's step, exponential, circular, elastic, bounce, and back.
(#60) adding U2KNode for ease function and node integration.
(#60) Finished k2nodes!
(#60) Sin in/out/in-out functions.
(#60) Transforming K2Node Pins to wildcard pins
(#60) Transforming K2Node Pins to wildcard pins
Merge pull request #62 from opiepj/feature/60-interpolation-addon

Feature/60 interpolation addon