add istanbul code coverage testing
Merge pull request #3 from lxe/master

Set default max sockets for agent instances to infinity, add travis CI integration, JSHint script, License, and tests
Merge pull request #6 from lxe/coverage-testing

Add istanbul code coverage testing
add david-dm dev-dependency status
Merge pull request #7 from lxe/david-dm

Add david-dm dev-dependency status
add coverage to jshintignore. fixes #8