README

### What
This is a README that is not completed.

### Why do so
There are few documents describe about this repository, and INSTALL or such documents are OK but not enough for beginners.

### Why not completed
I don't know much about this repository, so I can't write more about this but just leaving it as it is let it to be as it is, so I append a small README and "appeal" it to be expanded.
So don't expect me to write this more but this is the time you expand it, please ;)