Moved TTW to a test folder and added first outline of main discovery service

new file:   devices/power/binary/digital_loggers_inc/web_power_switch/8/PowerBinaryWebPowerSwitch8Impl.py
new file:   main/discovery/main.py
renamed:    ttw/Environments.py -> test/ttw/Environments.py
renamed:    ttw/Interfaces.py -> test/ttw/Interfaces.py
renamed:    ttw/Modifiers.py -> test/ttw/Modifiers.py
renamed:    ttw/Monitors.py -> test/ttw/Monitors.py
renamed:    ttw/Tests.py -> test/ttw/Tests.py
renamed:    ttw/TestsRun.py -> test/ttw/TestsRun.py
renamed:    ttw/env.py -> test/ttw/env.py
renamed:    ttw/run_ttw.py -> test/ttw/run_ttw.py
renamed:    ttw/tests/run-tests.sh -> test/ttw/tests/run-tests.sh
new file:   util/AbstractClass.py