Optimized dumping performance. Dumping is now about half as fast

as loading. Also slightly improved loading performance.
Greatly improved performance with very small files. We can now
load 10000 24 byte files in a second, and dump them at the same
speed.
Fixed another FastCharSearch bug.

dyaml/fastcharsearch.d

@@ -89,7 +89,7 @@ string searchCode(dstring chars, uint tableSize)()
 
     code ~= specialChars.length 
             ? "    return " ~ specialCharsCode() ~ ";\n"
-            : "    return false";
+            : "    return false;";
     code ~= "}\n";
 
     return code;