Clean up documentation in org.bdgenomics.adam.projection.

[fnothaft]

Towards #1083.

[AmplabJenkins]

Test FAILed.
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Build result: FAILURE

[...truncated 3 lines...]Building remotely on amp-jenkins-worker-05 (centos spark-test) in workspace /home/jenkins/workspace/ADAM-prbWiping out workspace first.Cloning the remote Git repositoryCloning repository https://github.com/bigdatagenomics/adam.git > /home/jenkins/git2/bin/git init /home/jenkins/workspace/ADAM-prb # timeout=10Fetching upstream changes from https://github.com/bigdatagenomics/adam.git > /home/jenkins/git2/bin/git --version # timeout=10 > /home/jenkins/git2/bin/git -c core.askpass=true fetch --tags --progress https://github.com/bigdatagenomics/adam.git +refs/heads/:refs/remotes/origin/ # timeout=15 > /home/jenkins/git2/bin/git config remote.origin.url https://github.com/bigdatagenomics/adam.git # timeout=10 > /home/jenkins/git2/bin/git config --add remote.origin.fetch +refs/heads/:refs/remotes/origin/ # timeout=10 > /home/jenkins/git2/bin/git config remote.origin.url https://github.com/bigdatagenomics/adam.git # timeout=10Fetching upstream changes from https://github.com/bigdatagenomics/adam.git > /home/jenkins/git2/bin/git -c core.askpass=true fetch --tags --progress https://github.com/bigdatagenomics/adam.git +refs/pull/:refs/remotes/origin/pr/ # timeout=15 > /home/jenkins/git2/bin/git rev-parse origin/pr/1255/merge^{commit} # timeout=10 > /home/jenkins/git2/bin/git branch -a --contains 59afc83 # timeout=10 > /home/jenkins/git2/bin/git rev-parse remotes/origin/pr/1255/merge^{commit} # timeout=10Checking out Revision 59afc83 (origin/pr/1255/merge) > /home/jenkins/git2/bin/git config core.sparsecheckout # timeout=10 > /home/jenkins/git2/bin/git checkout -f 59afc834ed34a14738361bf08f704eb9a221877cFirst time build. Skipping changelog.Triggering ADAM-prb ? 2.6.0,2.11,1.5.2,centosTriggering ADAM-prb ? 2.6.0,2.10,1.5.2,centosTouchstone configurations resulted in FAILURE, so aborting...Notifying endpoint 'HTTP:https://webhooks.gitter.im/e/ac8bb6e9f53357bc8aa8'
Test FAILed.

[AmplabJenkins]

Test PASSed.
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Test PASSed.

[fnothaft]

This is good to go.

[heuermh]

Thank you, @fnothaft!