Update NodeViewAcl + items gathering to support 'local' access model
Handle setting and retrieving of node configuration
Handle subscription requests and add some initial tests for subscribing
Drop HelperMock
Merge branch 'master' of github.com:buddycloud/buddycloud-server-java into local-access

Conflicts:
	src/main/java/org/buddycloud/channelserver/packetprocessor/iq/namespace/pubsub/get/items/UserItemsGet.java
Merge pull request #89 from surevine/local-access

Support 'local' access model