(Try to) Fix the readme problems found by the feedmereadmes guys:
* Tuned up the tagline
* Added info about what for, history, competitors, etc.
* Put more links for potential contributors
Hi,
attached patch updates README in CRIU repository:
- mark up text by markdown
- rename README file, because Github requires .MD
extension for files with Markdown inside
- describe the ways how to contribute to CRIU
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>