Design fixes as mentioned in #467

@jancborchardt Lets make a new try. :smile: 

This is some of the changes as discussed here https://github.com/owncloud/calendar/issues/467

Here it should be Torsdag 26 Jun. 2014 as I have changed it to in my code. 
Second should be Torsdag 26/6 (didn´t find that)

![namnls1](https://cloud.githubusercontent.com/assets/4511254/3424133/84687030-ffbf-11e3-9d55-4f3d2a95e9f1.png)

Here it should be 30 Jun. 2014 - 6 Jul. 2014 as I have changed to in my code.
("MMM d[ yyyy]{ '–'[ MMM] d yyyy}" => "d[ MMM yyyy]{ '–'[ d] MMM yyyy}",)
Second should be Mån. 30 Jun. (dindn´t find that) Looks cleaner

![namnls2](https://cloud.githubusercontent.com/assets/4511254/3424134/8468b8ec-ffbf-11e3-8b77-c9da8e061641.png)