freetype.dll issue, iohub updates, pyglet avbin import bug workaround

iohub:
* Reverted iohub to use local iosync python interface module for now.
* Updated gaze point GP3 implementation.

Bug Fixes:
* Textbox freetype.dll load now looks for freetype32 and freetype64 files as well if needed.
* Work around for what appears to be a pyglet 1.2 / psychopy 1.81 python standalone crash when avbin load failed. Maybe related to having 64 bit version of avbin in path too. Not sure. 
* Fixed iohub computer test_time test.