Exit on hubot-scripts.json errors
Exit on external-scripts.json errors
Exit on errors encountered while loadFile
Exit when failing to load external scripts from npm
Exit when adapter can't be loaded
Merge pull request #432 from github/exit-on-errors

Exit on errors during startup
release 2.4.8
Add ability to listen for topic changes

Adapters must specifically implement receiving TopicMessage when they handle a
changing topic.

Closes #349
Update README with formatting changes

Also remove the section of running the tests
Bump npm package versions
Merge branch 'master' into wiki-to-docs

Conflicts:
	README.md