Add support for non us-ascii characters in presentations

lib/keydown/tasks/slides.rb

@@ -19,7 +19,7 @@ def slides(file)
 
       say "Creating Keydown presentation from #{file}", :yellow
 
-      slide_deck = SlideDeck.new(File.new(file).read)
+      slide_deck = SlideDeck.new(File.new(file, 'rb').read)
       backgrounds = slide_deck.slides.collect do |slide|
         slide.background_image unless slide.background_image.empty?
       end.compact
@@ -41,4 +41,4 @@ def slides(file)
       end
     end
   end
-end
+end

spec/fixtures/with_non_usascii_chars.md

@@ -0,0 +1,13 @@
+# Kermit the Frog Says...
+
+!SLIDE
+
+# Esta presentación
+
+!SLIDE foo
+
+# es traída a ustedes por
+
+!SLIDE foo bar
+
+# un ñandú

spec/tasks/slides_spec.rb

@@ -213,4 +213,22 @@
       @doc.css('link[@href="css/keydown.css"]').length.should == 1
     end
   end
-end
+
+ describe "for a presentation that has non US-ASCII characters" do
+     before(:each) do
+      capture_output do
+        Dir.chdir project_dir do
+          file_name = "with_non_usascii_chars.md"
+          system "cp #{Keydown::Tasks.source_root}/spec/fixtures/#{file_name} #{tmp_dir}/test/#{file_name}"
+
+          @thor.invoke Keydown::Tasks, ["slides", file_name]
+
+          @file = File.new('with_non_usascii_chars.html')
+          @doc = Nokogiri(@file)
+        end
+      end
+    end
+
+    it_should_behave_like "generating a presentation file"
+  end
+end