Added onos-ui-archetype as a partial archetype to bootstrap UI development.
Modified onos-cli-archetype to be a partial archetype.

Change-Id: I172bca5f67519f052bbb116486b3f1d7c51bc4bf
diff --git a/tools/package/archetypes/ui/src/main/resources/archetype-resources/src/main/resources/css.html b/tools/package/archetypes/ui/src/main/resources/archetype-resources/src/main/resources/css.html
new file mode 100644
index 0000000..c469725
--- /dev/null
+++ b/tools/package/archetypes/ui/src/main/resources/archetype-resources/src/main/resources/css.html
@@ -0,0 +1 @@
+<link rel="stylesheet" href="app/view/sample/sample.css">
\ No newline at end of file