Describe the bug

It currently seems to be impossible to add a new public key to user's account using GHMyself. POST /user/keys is the relevant GitHub API endpoint.

To Reproduce
Read docs on GHMyself and observe the method not being present

Expected behavior
`GHMyself::addK

ByteBuffers gives a great deal of flexibility (they can be allocated in and off heap). If allocated outside the heap, they give a huge perf boost and, if allocated in the heap, they have more or less the same cost of a byte[].

Replacing byte[] will require changing the MessageReader and MessageWriter interfaces too, together with all the impls

I have noticed the Flick implementation is based on the equation for constant translational acceleration in a straight line (MRUV in portuguese), which is repeated at least a couple of times in the Flick implementation.
According to @ItaloYeltsin , we could improve the flick animation by moving this duplicated into a single function and then replace it with some kind of easing curve equation.

Description

The parameters "newProductVariant" and "oldProductVariant" should be renamed to "sourceProductVariant" and "targetProductVariant ". So it`s much more straight foreward to old and New.
But now this (old and new) is used as a convention across the whole library and is not so easy to do without wasting some time.