Update devDependencies (mocha, chai).

With chai 1.8, arguments are not longer deep equal to arrays.
See https://github.com/chaijs/deep-eql#rules
Merge pull request #151 from cscott/chai

Update devDependencies (mocha, chai).
Fix testling configuration.
Fix jepso ci integration.
Merge pull request #152 from cscott/testling

Update testling and jepso configuration.