Fix #52 - Add API versioning (v1)

app/views/api/v1/statuses/context.rabl

@@ -0,0 +1,13 @@
+object false
+
+node :ancestors do
+  @ancestors.map do |status|
+    partial('api/v1/statuses/show', object: status)
+  end
+end
+
+node :descendants do
+  @descendants.map do |status|
+    partial('api/v1/statuses/show', object: status)
+  end
+end