S5 Themes Support

Added support for S5 Themes. Themes are stored in the public/s5/themes/ directory.
6 themes are included: default, nautilus, blue, flower, i18n, pixel.

vendor/plugins/maruku/lib/maruku/output/s5/to_s5.rb

@@ -2,6 +2,17 @@
 module MaRuKu
 	 
 	class MDDocument
+
+	def s5_theme
+	  html_escape(self.attributes[:slide_theme] || "default")
+	end
+
+	def  html_escape(string)
+	  string.gsub( /&/, "&" ).
+	         gsub( /</, "&lt;" ).
+	         gsub( />/, "&gt;" ).
+	         gsub( /"/, "&quot;" )
+	end
 		
 	# Render as an HTML fragment (no head, just the content of BODY). (returns a string)
 	def to_s5(context={})