Update README with info about installing/testing/using

README.md

@@ -9,4 +9,31 @@ Dependencies
 ------------
 
  * PostgreSQL 9.3+ 
- * [Schema triggers extension](https://bitbucket.org/malloclabs/pg_schema_triggers)
+ * [Schema triggers extension]
+   (https://bitbucket.org/malloclabs/pg_schema_triggers)
+
+Install
+-------
+
+ make all install
+
+Test installation
+-----------------
+
+ make installcheck
+
+NOTE: if ``test_ddl_triggers`` fails it's likely due to an incomplete
+      installation of schema_triggers: you need to add ``schema_triggers.so``
+      to the ``shared_preload_libraries`` setting in postgresql.conf !
+
+Usage
+-----
+
+In a database that needs to beturned into a "cartodb" user database, run:
+
+```sql
+  CREATE EXTENSION postgis;
+  CREATE EXTENSION schema_triggers;
+  CREATE EXTENSION cartodb;
+```
+