Update .travis.yml.

- Don't allow failure on v0.10 of node.
- Remove build for v0.11 of node.
Relax version on node-logentries.
Add node version.
Migrate deployment from Appfog to Heroku.

- Remove node-logentries module.
- Update .travis.yaml file.
- Only deploy to Heroku on master.
Merge pull request #67 from sgunturi/deploy-to-heroku

Configure deployment to Heroku.
Don't log route requests. Add 404 route for unhandled requests.
Merge pull request #69 from sgunturi/update-error-handling

Don't log route requests. Add 404 route for unhandled requests.
Add version to footer. Convert repo URL to package.json value.
Merge pull request #70 from sgunturi/footer-updates

Add version to footer. Convert repo URL to package.json value.
Bump to 0.6.14.