Add .gcf-item-location and slightly modify the date parsing function.

```coffeescript
new Date dateString
```
seems to be able to parse the raw date strings from the google calendar JSON just fine. This seems significantly less convoluted than the current regular expression-based parsing method.

However, I only tested this in Chrome 27.  Because of this, I left in the old parsing expression method in as a fallback.

.gcf-item-location simply looks for ent.gd$where[0].valueString. Nothing fancy there.

Additionally, I fixed up a few typos and removed some parentheses from the coffeescript.