Adding event sink & dispatcher abstractions.
Increased strength of the provider & service types.
diff --git a/net/api/src/main/java/org/onlab/onos/net/host/HostProviderService.java b/net/api/src/main/java/org/onlab/onos/net/host/HostProviderService.java
index f91acbc..4c4859f 100644
--- a/net/api/src/main/java/org/onlab/onos/net/host/HostProviderService.java
+++ b/net/api/src/main/java/org/onlab/onos/net/host/HostProviderService.java
@@ -5,7 +5,7 @@
/**
* Means of conveying host information to the core.
*/
-public interface HostProviderService extends ProviderService {
+public interface HostProviderService extends ProviderService<HostProvider> {
/**
* Notifies the core when a host has been detected on a network along with