Beginning transition to mixin for SimioEyeLink
Minor change to SimioPsychtoolbox properties allowing use of deg2px during construction of SimioEyeLink
Adapting function calls to new syntax for addressing SimioEyeLink methods
Revised SimioEyeLink methods to refer to SimioEnv as self, and use eye property of SimioEnv, inherited from SimioEyeLink
Merge branch 'master' into mixin
Merge branch 'master' into mixin
Merge branch 'master' into mixin
SimioEyeLink now inherited by SimioEnv as part of mix-in. In order to complete transition, needed to defer addition of 'fixation' interface until after SimioIO is initialized (i.e. later in SimioEnv constructor rather than in SimioEyeLink constructor). In principle, this may not be necessary, if SimioIO can be initialized first....

Also, fixed a few small bugs with bad references via self, env, eye, etc. etc.

Some concerns about timing... wait() seems sluggish??
Merge branch 'mixin' of https://github.com/matthewrsilver/simio into mixin