Unit tests support for sfc-ui

karma-unit.tpl.js - config for karma test runner

package.json - config for npm package manager (contains packages required
to execute tests)

README.md - added step by step guide for karma installation and test execution

Change-Id: I19807a8a8404f7dfa1ffbef191ff0ec7970376a6
Signed-off-by: Andrej Kincel <akincel@cisco.com>