* Add script for pulling NFT trade data from nonfungible.com
* corrections for current state of API
* change data model to match data source
* change primary key
* pull data from initial dump first, then API
* pull all supported NFT's, not just cryptokitties
* disable problematic data sources
* rename function to satisfy linter
* Rename table to nonfungible_dot_com_trades
* rename parser module to nonfungible_dot_com from non_fungible_dot_com, for consistency
* correct mistaken reference to Bloxy
* rename NonfungibleDotComTrade to ...TradeResponse
* `NftTrade` -> `NonfungibleDotComTrade`
* rename files to match prior object renaming
* use fetchAsync instead of axios
* improve fetchAsync error message: include URL
* avoid non-null contraints in API trades too, not just for trades from the one-time dump
* disable mythereum publisher
