Compress JSON files

[tominsam]

frequency_lists.json is 934k. frequency_lists.lzma is 297k.

adjacency_graphs goes from 10k to 2k.

640k savings should be enough for anyone.

[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you sign our Contributor License Agreement before we can accept your contribution.
_{You have signed the CLA already but the status is still pending? Let us recheck it.}