Added test rows and known icons for 5 most common video format

knownIcons.txt

@@ -28,6 +28,7 @@
 .key
 .less
 .mid
+.mov
 .mp3
 .mp4
 .mpg
@@ -55,6 +56,7 @@
 .tiff
 .txt
 .wav
+.wmv
 .xls
 .xlsx
 .xml

test/main.go

@@ -26,9 +26,25 @@ type directoryItem struct {
 
 var testData = listingTemplateData{
 	Listing: []directoryItem{{
+		Size: "25 MiB",
+		Name: "film-in-one-of-many-formats-to-test-icons.avi",
+		Path: "film-in-one-of-many-formats-to-test-icons.avi",
+	}, {
+		Size: "25 MiB",
+		Name: "short-film.flv",
+		Path: "short-film.flv",
+	}, {
+		Size: "25 MiB",
+		Name: "short-film.wmv",
+		Path: "short-film.wmv",
+	}, {
 		Size: "25 MiB",
 		Name: "short-film.mov",
 		Path: "short-film.mov",
+	}, {
+		Size: "25 MiB",
+		Name: "short-film.mp4",
+		Path: "short-film.mp4",
 	}, {
 		Size: "1 KiB",
 		Name: "this-piece-of-papers-got-47-words-37-sentences-58-words-we-wanna-know.txt",