buffer provides safe, write-only and generics-free byte buffers, that can
be used without zeroing them first.
The main trait of this library is Buffer that represents a type that can
contain uninitialized bytes (such as Vec, ArrayVec, etc.) and can
safely be read into (e.g. using ReadBuffer).
In order to keep code sizes down, such a type implementing Buffer is
quickly converted into the struct BufferRef, so this is the type
receivers of types implementing Buffers should work with.
An example for the usage of this trait can be found with ReadBuffer which
implements reading into a buffer without initializing it first.