Revert "Adde libwebp header files to the project."

This reverts commit 9e38ca8fd09cb817870ef968c0cf78414c356ffa.
Added new folder vendor. Added libwebp header files.
Bumped build #.
Added libgif include files to the project.
Include clean up.
Bumped version #.
Added gif include dir to the include_dirs in binding.gyp.
Bumped build #.