Add syntax highlighting to README

Author: defrex

README.md

@@ -11,26 +11,26 @@ This is a collection of Django Model Field classes that are encrypted using [Key
 [Keyczar](http://www.keyczar.org/) is a crypto library that exposes a simple API by letting the user set things like the algorithm and key size right in the keyfile. It also provides for things like expiring old keys and cycling in new ones.
 
 #### Getting Started
-
-    $ pip install django-encrypted-fields
-
+```shell
+$ pip install django-encrypted-fields
+```
 Create a basic keyczar keyset. `AES-256` in this case.
-
-    $ mkdir fieldkeys
-    $ keyczart create --location=fieldkeys --purpose=crypt
-    $ keyczart addkey --location=fieldkeys --status=primary --size=256
-
+```shell
+$ mkdir fieldkeys
+$ keyczart create --location=fieldkeys --purpose=crypt
+$ keyczart addkey --location=fieldkeys --status=primary --size=256
+```
 In your `settings.py`
-
-    ENCRYPTED_FIELDS_KEYDIR = '/path/to/fieldkeys'
-
+```python
+ENCRYPTED_FIELDS_KEYDIR = '/path/to/fieldkeys'
+```
 Then, in `models.py`
+```python
+from encrypted_fields import EncryptedTextField
 
-    from encrypted_fields import EncryptedTextField
-
-    class MyModel(models.Model):
-        text_field = EncryptedTextField()
-
+class MyModel(models.Model):
+    text_field = EncryptedTextField()
+```
 Use your model as normal and your data will be encrypted in the database.
 
 _Warning:_ Once the data is encrypted, it can no longer to used to query or sort. In SQL, these will all look like text fields with random noise in them (which is what you want).
@@ -50,13 +50,11 @@ Currently build in and unit-tested fields. They have the save APIs as their non-
 #### Encrypt All The Fields!
 
 Making new fields is easy! Django Encrypted Fields uses a handy mixin to make upgrading pre-existing fields quite easy.
+```python
+from django.db import models
+from encrypted_fields import EncryptedFieldMixin
 
-    from django.db import models
-    from encrypted_fields import EncryptedFieldMixin
-
-    class EncryptedIPAddressField(EncryptedFieldMixin, models.IPAddressField):
-        pass
-
+class EncryptedIPAddressField(EncryptedFieldMixin, models.IPAddressField):
+    pass
+```
 Please report an issues you encounter when trying this, since I've only tested it with the fields above.
-
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