Windows: Install target for bundled libuv

- libuv does not provide an install target when building on
  Windows, use cmake -E copy instead
Windows: Install target for bundled luajit

- Luajit does not provide an install target for windows, make one
  using cmake
- FIXME: since there is no way to figure which headers are needed,
  to use wildcards for cmake -E copy, I just copied the entire src
  into include/luajit-2.0