lean into examples

examples/postgres/postgres.sh

@@ -0,0 +1,10 @@
+# First, be sure that you've installed Postgres
+# and have a server running locally at port 5432.
+
+# Then create an example database.
+$ createdb gobyexample
+
+# Now install the dependencies for the postgres
+# example and try running it.
+$ go get github.com/bmizerany/pq
+$ go run postgres.go