ENH: ioHub ET Validation results in degrees

Can you specify to calculate / report eye position accuracy in visual
degrees even if pixels are used for stim definition.
ENH: Change Tobii eye tracker calibration defaults

Made animation and target contraction speeds 50% faster. Make time until
next target is displayed 33% faster.
Merge branch 'master' of git://github.com/psychopy/psychopy
Merge branch 'master' of git://github.com/psychopy/psychopy
BF: Removed condition check that is not valid
BF: iohub_config_name kwarg in launchHubServer
Merge pull request #555 from isolver/master

ENH: eyetracker validation. BF: launchHubServer