Merge pull request #20 from smathot/master

Various minor improvements, including EyeTribe support in OpenSesame plug-ins
Merge pull request #21 from smathot/master

Further fixes to EyeTribe functionality and OpenSesame plug-ins
Add call to reset() in __init__

We seem to have forgotten this, as was brought to attention on the forum: http://forum.cogsci.nl/index.php?p=/discussion/1107/error-in-pygaze-plugin-for-opensesame
Bug fix: Screen to Tobii coordinate transformation

The y-coordinate (due to stupid copy-paste error) was divided by the display width rather than the height.
Added functionality for BioPac MP150 system

Useful for research with the MP150 ('squeezies'), which can be used to measure the maximum voluntary contraction (MVC). Depends on the mpdev DLL produced by BioPac (place it in the same directory as libmpdev, or make sure that it is installed on your system).
improved coding elegance in BioPac MP150 class

Fixed double sample time bug, and generally improved coding smoothness.
BioPac MP150 update

Added option to record to NumPy array buffer.
Improved DLL finding: Now the library first looks in the current directory, and if it cannot find mpdev.dll there it will look in the directory of libmpdev.py.
BioPac MP150 mpdev update
updated README
fixed post-calibration bug
Show camera image on PyLink <= 1.0
- Fixes a regression introduced when updating for PyLink >= 1.1
- Closes #23