Replace license with MIT

[dzmitry-lahoda]

As whole .NET is, like https://github.com/dotnet/corefx .
Apache will NOT save you name in such code as it will be reproduced in better quality in other place. Quality - some of issues I have created, but not only.
Sorry for being short on word. Just have drunk some coffee. I predict comin years to be years of 128 bit number https://en.wikipedia.org/wiki/128-bit . So could make MIT library popular.