Don't send events with an empty body
fixes 09557e4
Include room ID in MSC info logs
contrib: build image using local files instead of official latest
Use m.notice instead of m.text
Use regexp.MustCompile and make the regex constant
contrib: add links to files in README
Add link to contrib/README.md from main README
contrib: add simple Dockerfile and docker-compose.yml example files
Add simple "Usage" section to README
Add more shared code to shared function
Only respond to msgs that were sent in the last five minutes