Enable snapshot for webfinger

WF has a snapshot version, 1.0.0-SNAPSHOT, as outlined here: 

https://github.com/Btc4All/webfinger/blob/3f6ccf4274c311a35374d97e90b9550f8c215331/org/btc4all/webfinger/1.0.0-SNAPSHOT/webfinger-1.0.0-20140522.192601-1.pom