Converted all package.html files to package-info.java for easier package documentation.
diff --git a/of/ctl/src/main/java/org/onlab/onos/of/controller/impl/package-info.java b/of/ctl/src/main/java/org/onlab/onos/of/controller/impl/package-info.java
new file mode 100644
index 0000000..f5b4544
--- /dev/null
+++ b/of/ctl/src/main/java/org/onlab/onos/of/controller/impl/package-info.java
@@ -0,0 +1,4 @@
+/**
+ * Implementation of the OpenFlow controller IO subsystem.
+ */
+package org.onlab.onos.of.controller.impl;