title: Migrations in Django 1.7
body: <p>I am currently involved in a project where I am using Django 1.7 development version.I want to propogate changes that I make in my models (adding a field, deleting a model, etc.) into the database schema using "makemigrations" and "migrate" commmands.I added  a "age" field to one of the models in my application.</p>
  
  <pre><code>country = models.CharField(max_length=50, blank=True)
  address = models.CharField(max_length=100, blank=True)
  postal_code = models.IntegerField(max_length=50, blank=True)
  city = models.CharField(max_length=50, blank=True)
  phone_no = models.CharField(max_length=25, blank=True)
  skype_name = models.CharField('Skype Username',max_length=50, blank=True)
  age=models.IntegerField(max_length=25,blank=True)
  </code></pre>
  
  <p>When I use "makemigrations" command ,the output is like---"No changes detected".I guess that "makemigrations" is not  able to figure out the changes made to the schema.Any suggestions how can I make it work??</p>