Lemon market
Merge pull request #11 from oTree-org/lemon-market

Lemon market
refactoring
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Volunteer's dilemma
Merge pull request #12 from oTree-org/volunteer_dilemma

Volunteer's dilemma
Bertrand Competition
Merge pull request #13 from oTree-org/bertrand_competition

Bertrand Competition
Update README.md
Update README.md
Update README.md
removed tragedy game: reason - too similar to public goods
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lemon: added missing title
demo: removed unused file
asset market: changes in tests
Update models.py

change description
Update Question.html

change wording
Update Feedback.html

change woriding
Update Contribute.html

change wording