Parser: Add code,blockquote and begin img tag

parser.h

@@ -6,6 +6,7 @@ class Parser : public IParser
 {
   private:
 	std::string processLink(const PageDao &pageDao, UrlProvider &urlProvider, std::smatch &match) const;
+	std::string processImage(std::smatch &match) const;
 
   public:
 	std::string extractCommand(std::string cmdname, const std::string &content) const;