Let the Date constructor try to parse the date string first.

`new Date(dateString)` should produce valid date objects from all
datestrings in the google calendar JSON. However, keep around the old
regex-based parsing as a fallback anyway.
Parse event location and add it to the default template.
Remove parentheses from function calls.

Leave them in when they enhance readability.
Fix a few typos.
Merge pull request #9 from torque/master

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