Change --projects to not attempt to list installed ones in case of multiple dirs items are cloned to

lib/boxen/project.rb

@@ -16,9 +16,5 @@ module Boxen
       @dir  = dir
       @name = File.basename @dir
     end
-
-    def installed?
-      File.directory? dir
-    end
   end
 end

lib/boxen/runner.rb

@@ -52,9 +52,10 @@ module Boxen
       # --projects prints a list of available projects and exits.
 
       if flags.projects?
+        puts "You can install any of these projects with `#{$0} <project-name>`:\n"
+
         config.projects.each do |project|
-          prefix = project.installed? ? "*" : " "
-          puts "#{prefix} #{project.name}"
+          puts "  #{project.name}"
         end
 
         exit

test/boxen_project_test.rb

@@ -7,13 +7,6 @@ class BoxenProjectTest < Boxen::Test
     assert_equal "foo", project.dir
   end
 
-  def test_installed?
-    project = Boxen::Project.new "foo"
-
-    File.expects(:directory?).with("foo").returns true
-    assert project.installed?
-  end
-
   def test_name
     project = Boxen::Project.new "foo/bar/baz"
     assert_equal "baz", project.name