1. Modified README.md with instructions for rebuilding bootcamp info cache.
2. Modified bin/get_bootcamp_info.py to do better error reporting, and to tolerate errors if asked to.
3. Modified Makefile to use '-t' flag to tolerate errors in bootcamp info pages.
4. Shifted another bootcamp home page to GitHub.
5. Fixed harvesting script to retain user name in GitHub URLs (rather than assumine they were always 'swcarpentry').