Fix TravisCI calling npm test instead of Mocha

- Add Travis-specific Grunt task
- Add build status badge
Replace Grunt travis task with package manifest reference
Merge pull request #30 from interactive-pioneers/fix-travisci-build

Fix TravisCI calling npm test instead of Mocha
Fix with-plugin failing over outdated dependencies

Update all dependencies to fix #31
Merge pull request #32 from interactive-pioneers/fix-31-with-plugin-failure

Fix with-plugin failing over outdated dependencies