Updated integration docs to reflect current usage

Docs used Ubuntu 10.10 as a reference (which is now an unsupported release), suggested using ``sudo`` with brew (an anti-pattern) and in general did not reflect current (Django 1.7) practices for setting up a project.
How about reversing this: using sudo in the command example (which I guess it should be more common use case, especially for newbies) and documenting the use of the variant without sudo in not system-wide installation