avoid 30 css links limit on MS internet-explorers

IE loads only 30 css links, see
http://blogs.msdn.com/b/ieinternals/archive/2011/05/14/10164546.aspx and the demo http://demos.telerik.com/testcases/BrokenTheme.aspx

My solution is slice the css links by 31, use a `<style>` tag to `@import` the 31 css files.