MRG, FIX: Legacy and wrap

[larsoner]

1. Removes _legacy_setup, which we shouldn't need because it was for old Windows (like Windows 2000) and no longer exists in Pyglet as of Sept 2019.
2. Adds a workaround for text bugs.

For (2), on master this code:

from expyfun import ExperimentController
with ExperimentController(
        exp_name='CRM corpus example', window_size=(720, 480),
        full_screen=False, participant='foo', session='foo', version='dev',
        output_dir=None) as ec:
    ec.screen_prompt('Report the color and number spoken by the female '
                     'talker.', wrap=True, live_keys=['1'])

Produces:

And on this PR:

[codecov[bot]]

Codecov Report

Merging #410 into master will not change coverage. The diff coverage is 100%.

@@          Coverage Diff           @@
##           master    #410   +/-   ##
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  Coverage    88.5%   88.5%           
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  Files          49      49           
  Lines        6531    6531           
  Branches     1081    1081           
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  Hits         5780    5780           
  Misses        504     504           
  Partials      247     247