get rid of StudyFactory, revamp internals with pooled/singled/data
fix ipython_interact and subsets
rename metadata kwargs to be prepended with "metadata_"
add timestamps to stdout ouptuts
Merge branch 'feature/shalek2013_figures' of github.com:YeoLab/flotilla into feature/shalek2013_figures

* 'feature/shalek2013_figures' of github.com:YeoLab/flotilla:
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