Psychopy OSX 64-bit compatibility added

Got psychopy to work on 64-bit OSX systems, with pyglet 1.2 alpha 1
Corrected system check for pyglet.lib overload
Another corrected platform check

This one slipped my attention for a minute
Platform checks done right this time
Merge pull request #622 from hsogo/master

BF: Polygon component crashes when Size [w, h] $ is set to 'set every re...
ENH: Fix compatibility with wxPython 2.8

Starting the Builder with wyPython 2.8 raised AttributeErrors because
Font's Larger() method is not available before 2.9.1. The application
calls ensureMinimal() for 2.8 so this version should be supported. It
was fixed by adding a check if Larger() is available. Using a smaller
font still seems to work and allows using PsychoPy on older wxPython.
DOC: Fix typo in pylint configuration
Merge pull request #623 from philippwiesemann/fix-builder-compatibility-wxpython-font-larger

ENH: Fix compatibility with wxPython 2.8
Merge pull request #561 from dschreij/pyglet-1.2alpha1

Psychopy OSX 64-bit compatibility added
BF: Fix TypeError

The ERROR constant was called instead of the error function.

Found by pylint.
ENH: Fix typo in error message
DOC: Fix typo in docstring
DOC: Fix typos in docstrings
DOC: Fix typos in source comments
DOC: Fix typos in source comments
BF: Fix AttributeError in test main

An AttributeError was raised because the test main was not adapted after
a change of ListWidget to be a GlobSizer instead of just containing one.

Found by pylint.
BF: Fix NameError

A NameError was raised because logging was used but not imported.

Found by pylint.
DOC: Fix typos in source comments and log message
BF: proper positioning of popup menu when flow panel is at the top
Merge pull request #627 from jeremygray/bf-topflow-popup-menu-location

BF: proper positioning of popup menu when flow panel is at the top