Improve commands for unit-tests

[sea5kg]

must be also short

Now:

Help:
 './unit-tests' - run all unit-tests
 './unit-tests help' - print this help
 './unit-tests list' - print list of unit-tests
 './unit-tests run <TestName>' - run single unit-test

Improve to:

Help:
 './unit-tests' - run all unit-tests
 './unit-tests --help|h' - print this help
 './unit-tests --version|v' - print this help
 './unit-tests list|ls' - print list of unit-tests
 './unit-tests run|r <TestName>' - run single unit-test