Change readme to md format

README.md

@@ -5,10 +5,11 @@ It consists of the census and staging schemas. As well as some other minor table
 Some of these are built as part of exercises in the book.  
 
 To restore:
+```sql
 CREATE DATABASE postgresql_book;
 \connect postgresql_book
 \i postgresql_book.sql
-
+```
 
 IMDB movies list comes from ftp://ftp.fu-berlin.de/pub/misc/movies/database/movies.list.gz
 refer to copyright details in http://www.imdb.com/interfaces