Exchange related tests, restructure of framework

Added several tests to check the impact and interference of commands on the
token and traditional exchange. Furthermore the test framework itself was
partially restructured. This includes reordering the README and refined test
result reporting.

Tests run with Master Core,
Commit: 4c3f204401a5e2592912907365f6fc8e2870beb0

Full test log:
https://gist.githubusercontent.com/dexX7/3eca40c4c76fcaf36fe5/raw/

See TODOs in test files for further details.