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.
ac55a07852