This commit updates URLs to prefer the https protocol. Redirects are not followed to avoid accidentally expanding intentionally shortened URLs (i.e. if using a URL shortener).
# Fixed URLs
## Fixed Success
These URLs were switched to an https URL with a 2xx status. While the status was successful, your review is still recommended.
* [ ] http://www.apache.org/licenses/LICENSE-2.0 with 298 occurrences migrated to:
https://www.apache.org/licenses/LICENSE-2.0 ([https](https://www.apache.org/licenses/LICENSE-2.0) result 200).
For reference: https://jira.springsource.org/browse/INTSAMPLES-55
* Update README.md to reflect correct classes
* Improve documentation
* Add Maven Exec Maven Plugin for easy execution from the command line
