Implement the 'Following' UI

Implement the `Following` UI:
- Create a new left hand navigation page called `My Network` for both the personal dashboard and other users.
- The `My Network` page consists of 2 lists under 2 tabs called `Following` and `Followers`
- The list of `Following` has a `Stop following` action in the list options
- When viewing another user's profile there is a `Follow` clip in the right top corner for users I don't follow yet.
- Add activity cases for new following-related activities