Data table

Hi!
As promised, here are the changes I made in the bioblend code for biomaj2galaxy.
Tell me if you need more info/help!
There might be some change for the removing of data table items (see https://bitbucket.org/galaxy/galaxy-central/pull-request/577/add-an-api-to-remove-items-from-tool-data), I will try to keep an eye on this.
Anthony
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