Add link to WTF and SQLAlchemy

Large-app-how-to.md

@@ -16,11 +16,15 @@ SQL provide an easy and advanced way to serialize your object to different type
 
     pip install flask-sqlalchemy
 
+[http://packages.python.org/Flask-SQLAlchemy/](More here about SQL Alchemy flask package)
+
 ## Flask-WTF
 WTF (What the Form) Provides a easy way to handle user's data submission.
 
     pip install Flask-WTF
 
+[http://packages.python.org/Flask-WTF/](More here about What The Form flask package)
+
 # Overview
 Ok, so from now, we should have all the libs ready. Here the folder structures:
 
@@ -50,7 +54,7 @@ We'll create 4 modules, a user module (manage user's registration, login, passwo
 
 `shell.py` will allow you to get a console and enter commands within your flask environment. Maybe not as nice as debugging with pdb, but always usefull (when you will initialize your database)
 
-    #!/usr/bin/env python                                                                                                                                                                                         
+    #!/usr/bin/env python
     import os
     import readline
     from pprint import pprint
@@ -58,4 +62,6 @@ We'll create 4 modules, a user module (manage user's registration, login, passwo
     from flask import *
     from app import *
 
-    os.environ['PYTHONINSPECT'] = 'True'
+    os.environ['PYTHONINSPECT'] = 'True'
+
+