expose probe information for each selected gene in app

[stripathy]

Which probe is associated with the gene (with a link to some info about the probe).

I think this'll help expose the differences between the affy platforms.

[oganm]

I can direct to affymetrix site, but they can contradict with our reporting since we use re-alignments from gemma. Also affymetrix site requires a login to be query-able . Gemma doesn't seem to have a nice way of linking to its own annotations about the probe. I'll ask Paul