Fixes #235 - Return a proper error message when JSON payload is malformed.
Working games and etc unit tests.
Merge pull request #250 from AdrianGaudebert/working-unit-tests

Working games and etc unit tests.
Merge pull request #249 from AdrianGaudebert/235-catch-malformed-json

Fixes #235 - Return a proper error message when JSON payload is malformed.
replace koa with hapi (#245)