Two Issues

1. An issue that arose with multiple choice for report.php: it only showed one choice. Changed a few lines in lib.php for that with the corresponding function.
2. I got a warning from PHP about assigning by reference of some variable in report.php. I removed the ampersand, as per recommendations of new PHP standards. I hope that's fine?
![screen shot 2013-07-19 at 10 35 21 pm](https://f.cloud.github.com/assets/4048480/828349/cec629dc-f0b2-11e2-875b-64b0b4052909.png)