Run meetup ballot from travis

[aktech]

• Runs the meetup ballot from travis via Travis cron. It can be adjusted from here: https://docs.travis-ci.com/user/cron-jobs/

• The environment variables are stored in travis repository settings: https://docs.travis-ci.com/user/environment-variables/#defining-variables-in-repository-settings

[codecov-io]

Codecov Report

Merging #4 into master will decrease coverage by 1.13%. The diff coverage is 66.66%.

@@            Coverage Diff             @@
##           master       #4      +/-   ##
==========================================
- Coverage   83.69%   82.56%   -1.14%     
==========================================
  Files           2        2              
  Lines         184      195      +11     
==========================================
+ Hits          154      161       +7     
- Misses         30       34       +4

Impacted Files	Coverage Δ
meetup_ballot/ballot.py	77.87% <66.66%> (-1.54%)	:arrow_down:

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