Index CryptoKitties

These NFTs are so OG they do not conform to current standards, because the standards did not exist yet.

Here is the event signature to watch for:

```
[[event]]
name = "crypto_kitties"
start = 4605160
contract = "0x06012c8cf97bead5deae237070f9587f8e7a266d"
signature = "event Transfer (address from, address to, uint256 tokenId)"
```