#1440, #1441: Add translation tags for untranslated values across the coach reports.

See the issues.  Tested for tabular and scatter views, but not timeline view, not with data, and not the student view.

@aronasorman could you test please?

![image](https://f.cloud.github.com/assets/4072455/2073566/9e802926-8d60-11e3-8be2-11434c6b67a5.png)
![image](https://f.cloud.github.com/assets/4072455/2073564/91e61e32-8d60-11e3-8422-b3b692819a14.png)