#364 Turnout State names

[Bob Jacobsen]

There's a mechanism in place for changing the String names for Turnout.CLOSED and Turnout.THROWN, currently only used by Lenz systems. This should be:

* extended to work from the manager, so that it can be used _before_ creating a turnout

* implemented for all the systems that use different terminology (which is most)

* referenced in e.g. the TurnoutTable and Turnout Control, so the proper terminology is used on their buttons.

and additional aliases should be added to jmridefaults.py

[Dan Boudreau]

We should also let JMRI users enter their own turnout terminology for closed and thrown.