add zip format support

filechooser.lua

@@ -58,7 +58,8 @@ function FileChooser:readDir()
 			or file_type == "pdf" or file_type == "xps" or file_type == "cbz" 
 			or file_type == "epub" or file_type == "txt" or file_type == "rtf"
 			or file_type == "htm" or file_type == "html" or file_type == "mobi"
-			or file_type == "fb2" or file_type == "chm" or file_type == "doc" then
+			or file_type == "fb2" or file_type == "chm" or file_type == "doc"
+			or file_type == "zip" then
 				table.insert(self.files, f)
 			end
 		end

filesearcher.lua

@@ -40,7 +40,7 @@ function FileSearcher:readDir()
 				or file_type == "rtf" or file_type == "htm"
 				or file_type == "html" or file_type == "mobi"
 				or file_type == "fb2" or file_type == "chm"
-				or file_type == "doc" then
+				or file_type == "doc" or file_type == "zip" then
 					file_entry = {dir=d, name=f,}
 					table.insert(self.files, file_entry)
 					--debug("file:"..d.."/"..f)

reader.lua

@@ -44,7 +44,7 @@ function openFile(filename)
 		reader = DJVUReader
 	elseif file_type == "pdf" or file_type == "xps" or file_type == "cbz" then
 		reader = PDFReader
-	elseif file_type == "epub" or file_type == "txt" or file_type == "rtf" or file_type == "htm" or file_type == "html" or file_type == "fb2" or file_type == "chm" or file_type == "mobi" or file_type == "doc" then
+	elseif file_type == "epub" or file_type == "txt" or file_type == "rtf" or file_type == "htm" or file_type == "html" or file_type == "fb2" or file_type == "chm" or file_type == "mobi" or file_type == "doc" or file_type == "zip" then
 		reader = CREReader
 	end
 	if reader then