make ToUpper, ToLower etc. handle unicode properly.

Change their names too.

R=rsc
DELTA=206  (123 added, 2 deleted, 81 changed)
OCL=34170
CL=34194

src/pkg/unicode/maketables.go

@@ -474,7 +474,7 @@ func parseScript(line string, scripts map[string] []Script) {
 	if comment >= 0 {
 		line = line[0:comment]
 	}
-	line = strings.TrimSpaceASCII(line);
+	line = strings.TrimSpace(line);
 	if len(line) == 0 {
 		return
 	}