copy noscript tag list by slicing so that removeNoscriptTags works with multiple noscript tags.

in google chrome 24.0.1312.57 the tag list changes while we iterate over it and delete tags.
in order to make this function work with multiple no script tags we have to copy the original tag list.
Merge pull request #186 from vollnhals/fixes

copy noscript tag list by slicing so that removeNoscriptTags works with multiple noscript tags