Possibility to describe pools

[FrostyX]

This discussion made me think of something:

[03:54] <Justin​>  Be great to see a few more s390x builders.
[15:00] <Stephen J Smoogen​>  I think the s390x builders are virtual
machines loaned to COPR from a university program. Getting more is not
possible there and getting more at other places is also very hard to get  
[15:07] <praiskup​>  Stephen J Smoogen: s390x is sponsored by IBM (in
IBM Cloud)  

It would be nice if we could optionally define a description field for our pools in pools.yaml and mention any relevant information we have for them. For example, name whoever sponsored them to give them credit. We could then display the description in Resalloc WebUI.