New Theme and more

Added a new theme which has a category overview like a lot of blogs
have. There is an in-page link to the comment section and when you are
logged in, it does not display the login button in the footer anymore.
added urldecode and encoding for diacritic characters

https://github.com/madskristensen/MiniBlog/issues/6
Added less files and reverted web.config

the adminmenu is without icons again and the web.config has its new
lines again. But I don't have the less working for the other theme.
Merge pull request #5 from jphellemons/master

New Theme and more