API Agreement.
Merge branch 'master' of github.com:lintool/twitter-tools
Added blurb about participation.
Minor tweak to README
Tweaked artifact name.
Downloaded correct qrels: these are mirrors of the data at http://trec.nist.gov/data/microblog.html
moved data/ to top directory
Ignores qrels.
Fixed broken tests, supports replicable raw/baseline results. Added documentation.