Group potential flows by journal name/logo

![screen shot 2014-12-11 at 1 44 30 pm](https://cloud.githubusercontent.com/assets/65030/5399733/da571278-813b-11e4-8794-7414f0989bd3.png)

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ASB
Can we replace the three occurrences of `titleFromFlow(flow)` with a variable? Maybe `flowJournalName`?