change "visitor" trust level to "new user"

I blame me for this mistake.. visitor means other stuff in practice. New
User is correct meaning.

spec/components/post_revisor_spec.rb

@@ -4,8 +4,8 @@ require 'post_revisor'
 describe PostRevisor do
 
   let(:topic) { Fabricate(:topic) }
-  let(:visitor) { Fabricate(:visitor) }
-  let(:post_args) { {user: visitor, topic: topic} }
+  let(:newuser) { Fabricate(:newuser) }
+  let(:post_args) { {user: newuser, topic: topic} }
 
   context 'revise' do
     let(:post) { Fabricate(:post, post_args) }
@@ -186,7 +186,7 @@ describe PostRevisor do
       end
     end
 
-    describe "admin editing a visitor's post" do
+    describe "admin editing a new user's post" do
       let(:changed_by) { Fabricate(:admin) }
 
       before do
@@ -194,18 +194,18 @@ describe PostRevisor do
         subject.revise!(changed_by, "So, post them here!\nhttp://i.imgur.com/FGg7Vzu.gif")
       end
 
-      it "allows an admin to insert images into a visitor's post" do
+      it "allows an admin to insert images into a new user's post" do
         post.errors.should be_blank
       end
     end
 
-    describe "visitor editing their own post" do
+    describe "new user editing their own post" do
       before do
         SiteSetting.stubs(:too_many_images).returns(0)
         subject.revise!(post.user, "So, post them here!\nhttp://i.imgur.com/FGg7Vzu.gif")
       end
 
-      it "allows an admin to insert images into a visitor's post" do
+      it "allows an admin to insert images into a new user's post" do
         post.errors.should be_present
       end
 

spec/components/promotion_spec.rb

@@ -3,9 +3,9 @@ require 'promotion'
 
 describe Promotion do
 
-  context "visitor" do
+  context "newuser" do
 
-    let(:user) { Fabricate(:user, trust_level: TrustLevel.levels[:visitor])}
+    let(:user) { Fabricate(:user, trust_level: TrustLevel.levels[:newuser])}
     let(:promotion) { Promotion.new(user) }
 
     it "doesn't raise an error with a nil user" do
@@ -20,7 +20,7 @@ describe Promotion do
       end
 
       it "has not changed the user's trust level" do
-        user.trust_level.should == TrustLevel.levels[:visitor]
+        user.trust_level.should == TrustLevel.levels[:newuser]
       end
     end