bug 1063130 - Load features from webcompat data
bug 1063130 - Load features from webcompat data

All feature names are treated as non-canonical English strings.  Import
is very slow due to incremental cache updates.

renoirb/browsercompat,mdn/browsercompat,jwhitlock/web-platform-compat,jwhitlock/web-platform-compat,mdn/browsercompat,mdn/browsercompat,renoirb/browsercompat,renoirb/browsercompat,jwhitlock/web-platform-compat