Added more support for YAML merge nodes, anchors and aliases

And added deeper support for Aliases. Also added in local file handling through renamed `FSHandler` configuration property for the index.

Also re-ran `go fmt`

Signed-off-by: Dave Shanley <dave@quobix.com>

datamodel/low/base/schema_proxy.go

@@ -80,6 +80,7 @@ func (sp *SchemaProxy) Schema() *Schema {
 		return sp.rendered
 	}
 	schema := new(Schema)
+	utils.CheckForMergeNodes(sp.vn)
 	err := schema.Build(sp.vn, sp.idx)
 	if err != nil {
 		sp.buildError = err