code review fixes

- :live_installation support
- rename activate to restore_state
- fully qualify ::Restore call
raise error in scc_finish client on wrong usage
scc_finish - better handle script parameters
improved scc_finish_test
use ::Registration to be sure there is no collision in Yast namespace
Merge pull request #24 from yast/select_repos

Display a popup for selecting/deselecting registered repositories
experimental travis CI support
do not use bundler
Create README.md
add coveralls support
Update README.md
Update README.md
Added license and development status badges
experimental "require" stubbing
use yast_stubs, mock require "yast"
share require "yast" stubbing