Added various program options to the user interface.

+ A trailing slash is removed from the source path by the directory reader.
+ Added UI output of the processing time.
+ Added UI option to print lines to the console.
+ Changed read mode switch to radio group in the user interface.
+ Minor bugfix: Empty files are not read.

DirectoryReader.m

@@ -27,7 +27,10 @@ - (id)initWithPath:(NSString*)path {
 		if (!path || [path length] <= 0) {
 			return nil;
 		}
-		m_path = path;
+		// Remove trailing slash if appended.
+		NSMutableString* mutablePath = [NSMutableString stringWithString:path];
+		[mutablePath replaceOccurrencesOfString:@"/" withString:@"" options:NSBackwardsSearch range:NSMakeRange([path length] - 1, 1)];
+		m_path = mutablePath;
 	}
 	return self;
 }