Numeric values in metadata must be given as String

[thomasstjerne]

Thanks for this great project!
I was trying to load a BIOM file where some metadata are given as Numbers (Float or Int). This makes the Phinch app Crash as it calls the split function assuming it is a string:

Phinch/app/components/Filter.js

Line 408 in 63c26ef

[value] = value.split(' ');

I realised that the flagship datasets actually have numeric data stored as ASCII strings, which is why they do not crash the app.