Make test utility

[zilm13]

We need some handy test runner as an alternative to current ./gradlew test. What we don't like with gradle:

• awkward output. We want to see: every passed or failed test on the screen in the end of the test run, ideally it should be colored. Plus, time next to every test.
• it's difficult to choose only number of tests to run. Plus, we should provide github tests repo path and test names with command line interface.
• we want to see spec version at the top of output
• ....open for additions