Replicate the Pretty Little Calendar styles

There is a gihub project (http://anasnakawa.github.com/kalendae-skins/) which has styled itself based on a nice calendar design called [Pretty Little Calendar](http://www.premiumpixels.com/freebies/pretty-little-calendar-psd/). I then tried to improve the kalendae-skins styles to get it closer to the [Pretty Little Calendar design](https://github.com/ianchanning/kalendae-skins/blob/master/skins/css/metal.css). I've then taken these styles and applied them to this calendar
Style fixes

* Replaced all spaces with tabs
* Slight fixes to the header and table margins
Update jquery.datePicker.js

Change cellspacing to zero otherwise it overrides the IE6 css
Removed IE filter css

The filter css just never properly works on td and th elements (http://stackoverflow.com/a/15946445/327074)
Merge pull request #4 from ianchanning/master

Pretty Little Calendar updates