saveAsWideText now also returns dataframe

Only about two lines of code had to be added, simple DataFrame commands. and about 4 lines of code moved up in the function. Sorry the github preview shows a bunch of deleted spaces added back in, I think that's an artifact of copy/paste (I still don't have my local repository working). Tested with stand-alone Psychopy v1.81.02, but of course none of this should be heavily version-dependent. 

This is the minimal solution, just adding return of a dataframe to saveAsWideText. I suspect it violates psychopy convention and expectation. I should write a function whose only role is to return a dataframe. Also the code should be vectorised. I can add all this to a github issue that I can post. I don't have time to do much more this year, but if you really want a stand-alone function, I could inelegantly duplicate saveAsWideText, delete the file-writing lines and replace them with the DataFrame lines.

Let me know, the other thing that possibly has to be done is do it for ExperimentHandler.
Initial support for Tobii EyeX on windows

Note that this requires the Tobii EyeX drivers from
http://developer.tobii.com/eyex-sdk/
TESTS: travis needs pandas

Saving data from ExperimentHandler now expects pandas
Merge pull request #760 from alexholcombe/patch-1

saveAsWideText now also returns dataframe
Add EyeX to selectTracker sample
Refactor structs in preparation for more
Correct-ish data timestamp delay calculations
Correcting timestamp stuff as close as we can get
ENH: Fix typos in benchmark wizard dialog
DOC: Fix typo in LICENSE.txt
DOC: Fix incorrect TTF file paths in LICENSES.txt
DOC: Fix typo in pylint configuration
DOC: Fix typo in README.txt
ENH: Fix typos in language name mappings
DOC: Fix typos in localization documentation
DOC: Fix typos in Builder demo READMEs
ENH: Fix typos in Coder demos
DOC: Fix typos and wording in tips file
DOC: Fix typo in command line help

There was a typo in the description of the "--no-splash" parameter. This
was temporarily fixed in September 2014 but then reverted.
DOC: Fix wording in command line help