Update README.md

Fix some virtualenv confusion. Don't cd into virtualenv but activate it.
Merge pull request #42 from kevgathuku/patch-1

Update README.md
django:startapp, django:model, with documentation and tests
Added Sinon to package dev dependencies
Make original common file into a template
Add choice of Django version
Revert to string choices - same outcome but easier to test
Tests for django version into COMMON
Fix #47
Add trailing ',' in installed apps to avoid single item tuple issue
Add randomstring to dependencies
Make dev.py into template and create secret
Correct order for model key in Foreign and ManyToMany
Change to subdirectory tests
Merge pull request #46 from matiboy/choose-django-version

Choose django version on project creation
Merge pull request #43 from matiboy/startapp-and-model-creation-commands

django:startapp, django:model, with documentation and tests
Merge pull request #48 from matiboy/47

Fix #47
Update README and Changelog
Update package version
Revert to copy for requirements/DEVELOP (it's in settings we need template)