revert postgres

config/database.yml

@@ -13,7 +13,7 @@
 # gem 'pg'
 #
 development:
-  adapter: sqlite3
+  adapter: postgresql
   encoding: unicode
   database: libr_development
   pool: 5
@@ -40,13 +40,14 @@ development:
 # re-generated from your development database when you run "rake".
 # Do not set this db to the same as development or production.
 test:
-  adapter: sqlite3
+  adapter: postgresql
   encoding: unicode
   database: libr_test
   pool: 5
   user: postgres
   password:
   host: localhost
+
 production:
   adapter: postgresql
   encoding: unicode