Improvements to StramEvents widget

Various improvements:

- order of events are oldest to newest in both modes
- tail mode can "detach" from following events (a la Travis CI)
- removed raw event data option (all info shown for every event specifically)
- "Today" button text in datepicker changed to "Now"

![image](https://cloud.githubusercontent.com/assets/1390651/3295231/8451060c-f5ba-11e3-8b5f-9ad75e724b8d.png)