Add gpx sample

	renamed:    plugins/net.sf.e4ftrace.test/samples/gpx/Current.gpx -> plugins/net.sf.e4ftrace.test/samples/gpx/Current_0406.gpx
	new file:   plugins/net.sf.e4ftrace.test/samples/gpx/Current_0421.gpx
Add string parser

	modified:   plugins/net.sf.e4ftrace.test/src/net/sf/e4ftrace/test/io/NioReadLineTest.java