Add default site customization pages

From now on these static pages:

`/privacy'
`/conditions'
`/accesibility'
`/help/faq'
`/welcome'

have been moved to the DB and can be modified easily by any
administrator in `/admin/site_customization/pages'

spec/lib/admin_wysiwyg_sanitizer_spec.rb

@@ -4,9 +4,30 @@ describe AdminWYSIWYGSanitizer do
   let(:sanitizer) { AdminWYSIWYGSanitizer.new }
 
   describe "#sanitize" do
+
     it "allows images" do
       html = 'Dangerous<img src="/smile.png" alt="Smile" style="width: 10px;"> image'
       expect(sanitizer.sanitize(html)).to eq(html)
     end
+
+    it "allows tables" do
+      html = '<table align="center" border="2" cellpadding="2" cellspacing="2" dir="ltr" ' \
+                    'id="table_id" class="stylesheet_classes" style="height:200px;width:500px;" ' \
+                    'summary="summary">
+                <caption>caption</caption>
+                <tbody>
+                  <tr>
+                    <th scope="row">header 1</th>
+                    <td>cell 1</td>
+                  </tr>
+                  <tr>
+                    <th scope="row">header 2</th>
+                    <td>cell 2</td>
+                  </tr>
+                </tbody>
+              </table>'
+      expect(sanitizer.sanitize(html)).to eq(html)
+    end
+
   end
 end

spec/lib/tasks/db_spec.rb

@@ -0,0 +1,15 @@
+require "rails_helper"
+
+describe "rake db:pages" do
+  let :run_rake_task do
+    Rake.application.invoke_task("db:pages")
+  end
+
+  it "seeds the database with the default custom pages" do
+    SiteCustomization::Page.destroy_all
+    expect(SiteCustomization::Page.count).to be 0
+
+    run_rake_task
+    expect(SiteCustomization::Page.count).to be 7
+  end
+end