update django to 1_7b1

### What is the problem / feature ?

Django 1.7b1 is out

### How did it get fixed / implemented ?

Updated the requirements.txt file

### How can someone test / see it ?

`pip freeze`

*Here is a cute baby animal picture for your troubles...*

![cute-baby-ducks-wallpaper](https://f.cloud.github.com/assets/824194/2489957/ab526754-b182-11e3-9277-6c5955dc8a15.jpg)