README: Add install command

Signed-off-by: SeongJae Park <sj38.park@gmail.com>
Add script for SRPMs extraction

Signed-off-by: SeongJae Park <sj38.park@gmail.com>
Merge changes from github

Signed-off-by: SeongJae Park <sj38.park@gmail.com>

Conflicts:
	README.md