Rename #as_html -> #to_html for consistency
Add description field to Project
Add minimal feature spec for 'Project page'
Implement ProjectPresenter
Fix params error in MembershipsController
Make AddingAPersonToAProject expose form according to project or person
  Moving the memberships association declarations to Project model

  * WIP: move it back to the appropriate context, refactor the context in
    such a way that makes it look more natural
    See also [032e385a4f]
Make ProjectsController use ProjectPresenter instead of ViewingAnEntry