removes organisation reports controller

organisation reports controller is completely refactored into organisations controller.  Insanity?  Perhaps - but this is an example of a broader refactoring we could do of the user reports controller into the users controller ... very interested to see what @jonnymo @mtc2013 and @marianmosley think of this method:

```ruby
  def index
    @resend_invitation = false
    set_default_if_missing_or_not_admin(params,{scopes:['order_by_most_recent'],template:'index',layout:'two_columns'})
    @organisations = Organisation
    params[:scopes].each { |scope|  @organisations = @organisations.send(scope.to_sym) }
    @json = gmap4rails_with_popup_partial(@organisations,'popup')
    @category_options = Category.html_drop_down_options
    render :template => 'organisations/'+params[:template], :layout => params[:layout]
  end
```
how about here:

params[:scopes].select{ |scope| known_valid_scopes.include? scope}.each ...