Added support for user, user_roles, page, blog export and import.

Added basic support for comments, for now mainly viewing comments from database (no submission forms yet).
Added first simple wikitext filter (render wikitext content as xhtml).
Ensure response content type is text/html with utf-8 charset.

modules/wikitext/wikitext_filter.e

@@ -40,10 +40,10 @@ feature -- Conversion
 				if s32.is_valid_as_string_8 then
 					l_wikitext := s32.as_string_8
 				else
-					l_wikitext := utf.utf_32_string_to_utf_8_string_8 (s32)
+					l_wikitext := adapted_text (s32)
 				end
 			else
-				l_wikitext := utf.utf_32_string_to_utf_8_string_8 (a_text)
+				l_wikitext := adapted_text (a_text)
 			end
 			create wk.make_from_string (l_wikitext)
 			if attached wk.structure as st then
@@ -58,8 +58,19 @@ feature -- Conversion
 --				elseif attached {STRING_32} a_text as s32 then
 --					s32.wipe_out
 --				end
-				a_text.append (html)
+				if attached {STRING_32} a_text as a_unicode_text then
+					a_text.append (utf.utf_8_string_8_to_string_32 (html))
+				else
+					a_text.append (html)
+				end
 			end
 		end
 
+	adapted_text (s: READABLE_STRING_32): STRING_8
+		local
+			utf: UTF_CONVERTER
+		do
+			Result := utf.utf_32_string_to_utf_8_string_8 (s)
+		end
+
 end