move src/data folder to /data?

[newgene]

This is very minor and low priority.

I found myself many times to click into data folder instead when I actually wanted to go to hub folder. Probably just because the name "data" confused me.

Don't know if that's just me or not. One suggestion would be to move /src/data to the top-level /data, considering this folder is not the application code itself, just some data relevant to the application.

And this could be applicable for other biothings API code bases.