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Merge pull request #51 from kurokoda/master

Removed duplicate chart
Merge branch 'master' of github.com:cicadas-2014/percolator
Merge pull request #52 from cicadas-2014/intertwine

Intertwine
commit before pull
Merge branch 'master' of https://github.com/cicadas-2014/percolator into improvements
Merge pull request #53 from mcclungt/improvements

created improvement model and model spec
Cleaning up display of problem view
Merge branch 'master' of github.com:cicadas-2014/percolator