Added the ability to have hashtags with dashes in them

model/utils.go

@@ -260,7 +260,7 @@ func Etag(parts ...interface{}) string {
 	return etag
 }
 
-var validHashtag = regexp.MustCompile(`^(#[A-Za-z]+[A-Za-z0-9_]*[A-Za-z0-9])$`)
+var validHashtag = regexp.MustCompile(`^(#[A-Za-z]+[A-Za-z0-9_\-]*[A-Za-z0-9])$`)
 var puncStart = regexp.MustCompile(`^[.,()&$!\[\]{}"':;\\]+`)
 var puncEnd = regexp.MustCompile(`[.,()&$#!\[\]{}"':;\\]+$`)