Make the ReadMe.md more descriptive

[aleksei-burlakov]

It would be nice if the ReadMe explained how to compile and install the project. Like what packages are required to compile the project, how to make an image with the newly compiled operational system and to start a virtual machine with the newly created image.

[crazyss]

@coolgw has been issued a PR. Give a dependency list.
Keep this issue open so that reminder us improve Doc.