add higher frequency bins

[JesseLivezey]

• [x] get cfs.mat from @maxdougherty
• [ ] add data to python object

[JesseLivezey]

I've been putting these things here https://github.com/BouchardLab/process_ecog/blob/27804dcb637a19d9595fb86798999fd4f271e77a/ecog/utils/bands.py

might be a good idea to make a formal object for collecting this information for different standards