Don't serialize nulls
Updated readme with maven repository (can be removed when it makes it
into maven central)
Added option to disable model parsing.  This will allow for some
functionality if something about the models causes the doclet to
malfunction
updated readme to only allow for snapshots
Merge pull request #27 from ESPNMichaelKidd/master

Small improvements
[PATCH] use org.sonatype.swagger groupId for patched artifact