Update lua-stdlib and lua-stdlib-doc to 11.

Changes since 8:
    - Updates the object module to be the same as that published in "Lua
      Gems", and fixes a bug in the utility mk1file which makes a one-file
      version of the library, to stop it permanently redefining require.
    - Fixes table.deepclone to copy metatables, as it should.
    - Fixes a bug in string.format, removes the redundant string.join
      (it's the same as table.concat), and adds to table.clone and
      table.deepclone the ability to copy without metatables.

(minskim)