Remove the insertion of "dk_fouc" class

+ FOUC solution works perfectly in all major browser running in Windows
7, Windows 8 and Ubuntu 14.04
+ Verified also on OSX 10.6 but it performs only a mild difference in
the position of the text
Async loading GIST almost no FOUC

Loading GIST asynchronously we hardly realize FOUC
Revert "Async loading GIST almost no FOUC"

This reverts commit 045a8557d2bb476c6b807f3a8e5e9bd36a9578f9.
Async load GIST almost no FOUC

Loading GIST asynchronously we hardly realize FOUC
Merge pull request #203 from acemir/version-1.5

Remove the insertion of "dk_fouc" class