Added EnumExtensions which caches enum lookup
Revert "Added EnumExtensions which caches enum lookup"

This reverts commit 4e21c8afe94d3a2dfe018d0f31efd6f4f8b8a963.
Added EnumExtensions which caches enum lookup
Merge branch 'master' of https://github.com/kasperbrandtpedersen/NUtil.git