add grunt-webui
Revert "add grunt-webui"

This reverts commit dd51162261b8a4cc37eac1e5f74a2f5714189154.
add preinstall
Revert "add grunt-webui"

This reverts commit dd51162261b8a4cc37eac1e5f74a2f5714189154. (reverted from commit 5bfdbb4a95e69d338353b2386a018e243fef1e9a)