Reduce default prefix length to 14 bits
Reduce default prefix length to 14 bits

Reasons for reducing the prefix length to 14 bits:

* Increase deniability (Realistically the network will grow to less than 100,000 active nodes within the first year. Using 16 bits gives a very poor deniability ratio of 100,000/2^16 < 1!)
* Maintain room for growth (I am assuming nodes can bear an 8-to-1 deniability ratio. With 14 bits, that means the network can grow to 8*2^14 = 131,072 active users before the default prefix length will need changing. This is at least one year after launch.)
* It reduces the number of prefixes which makes DHT crawling for prefixes significantly easier for partners such as Duo.
duomarket/openbazaar-test-nodes,duomarket/openbazaar-test-nodes,JustinDrake/openbazaar-go,OpenBazaar/openbazaar-go,yurizhykin/openbazaar-go,hoffmabc/openbazaar-go,OpenBazaar/openbazaar-go,jackkleeman/openbazaar-go,gubatron/openbazaar-go,gubatron/openbazaar-go,cpacia/openbazaar-go,cpacia/openbazaar-go,JustinDrake/openbazaar-go,OpenBazaar/openbazaar-go,jackkleeman/openbazaar-go,yurizhykin/openbazaar-go,hoffmabc/openbazaar-go,cpacia/openbazaar-go,hoffmabc/openbazaar-go,duomarket/openbazaar-test-nodes,jackkleeman/openbazaar-go,gubatron/openbazaar-go,yurizhykin/openbazaar-go,JustinDrake/openbazaar-go