BF: ioHub RemoteEventSubscriber device fixes

The ioHub RemoteEventSubscriber device now waits for the indicated event
publisher address:port to come on-line if the sub is started before the
pub.
initial theeyetribe eye tracker dir struct
BF: ioHub LC ET interface: Cal settings now work.
Cleaned up iohub TheEyeTribe ET interface

- removed unnessary code
- change product name in comments
- marked each area in code that will need to be written for TET
interface using a TODO comment

Still totally non functional, but now have clean starting point to add
actual TheEyeTribe interface code for ioHub.
Merge pull request #502 from isolver/master

BF: ioHub RemoteEventSubscriber device fixes
TESTS: fixed test for amended fitCumNorm
DOCS: rendering info elaborated
FF: Fixed glitch in elementArray rendering since new coordinates system

Was caused by a problem with ordering and reshaping
Merge pull request #505 from jeremygray/master

ENH: visual.RatingScale better marker='hover'
Merge pull request #507 from peircej/master

fixed fitCumNorm test and fixed recent ElementArrayStim rendering glitch