Expyriment 0.6.2 released!

[Florian Krause]

Expyriment 0.6.2 has just been released. This is a bugfix release.
Get it from: www.expyriment.org/getit

New Features:
- new stimuli.extras.PolygonLine class

Fixed:
- Expyriment could not be imported on Windows 7 64
- misc.geometry.position2coordinate bug

Changed:
- stimuli.Line was rewritten to not depend on PolygonRectangle anymore;
  the old Line stimulus is now stimuli.extras.PolygonLine