added progress on TheEyeTribe python interface

test files are in psychopy\iohub\devices\eyetracker\hw\theeyetribe\test

* Set TEST_WITH_DUMMY_SERVER = False to test with real eyetribe server.

* run the test:

python eyetribetest.py
Expand user_variables into individual columns of the session meta data
ENH: Updated eyetribe eye tracker interface

* based on work Zaheer and I did today.
* NOT USABLE YET; but will only be another couple weeks before
integration with iohub is done and tested I would think.
Cool!
Merge branch 'dataview'
The ip_id_num is now grouped by (experiment_id, session_id) before enumerating. This should help merging etc.
Added the ability to retain certain columns, such as ip start times, in the filtered data
Use ujson if possible
Merge pull request #7 from pedmiston/master

Improvements to InterestPeriodDefinition class
removed double openning of hdf5 when in read mode
Merge branch 'master' of git://github.com/psychopy/psychopy
Merge branch 'master' of https://github.com/isolver/psychopy
BF: cwd is changed to C:\eyegaze for calib.
BF: handling SMI FILTER_LEVEL: None
ENH: SMI interface now supports sendCommand(...)
Merge branch 'master' of git://github.com/psychopy/psychopy
BF: iohub mouse.getPosition when no mouse events

Fixed the iohub Mouse device's getPosition() to handle being called
before any mouse events are received by iohub. This will be rare, but is
technically possible.

Now, if no events have yet been received, mouse.getPosition() gets the
current mouse position by querying the OS.
BF: keyboard/mouse event window_id field on Linux

Keyboard and Mouse event code has been updated to work on more Linux
distro's and / or with PyXlib 0.14 as well as 0.15 in terms of getting
the current in focus window id.
ENH: iohub 'report_system_wide_events' on Linux

The iohub setting 'report_system_wide_events' for the Mouse and Keyboard
devices now works on Linux as well.
ENH: Removed 'dummyserver', updated eyetribe py
BF: Fixed bug in iohub mouse getPosition

bug caused by last commit related to same topic.