Version 2.7.1 patch and release

[Colin Viebrock]

There was a bug in OPS->readData(), where it might not read all of the
available data.  Thanks to Pat Ekman for the fix.

I've released a patch against OPS.php as released in version 2.7.  To
apply the patch, download the patch file and run:

        patch OPS.php < opensrs-php-2.71.patch

If you can't apply the patch, just download and install the 2.7.1
package.  No other changes (except for version numbers) have changed
since 2.7.

- Colin