Merge branch 'develop' into feature-models
added more token test cases
added more token test cases; updated token_string removal logic
assume the presence of env var TOKEN_EXPIRATION_TIMEOUT_MILLISECONDS
removed branch from coverage badge
removed app.coffee fore now since it is unused and skews code coverage reporting
run npm test immediately after test-coverage on travis ci for human-readable reporting
coverage badge points to develop branch
merged from feature-models