Add message about GNU screen.
Some errors fixed in docs. Auto-log added.

octopus.run(runnable) now adds stdout logging to runnable.

Added some links to the documentation and fixed some examples.
Corrected WPI documentation
Modify phidget temperature sensor to stop crashes.

Phidget Python internal event handlers have been found to freeze
periodically. This update replaces their use in the TemperatureSensor
driver.