build: reduce tarball size by 8-10%
build: reduce tarball size by 8-10%

Slim the tarballs further by removing examples, documentation and test for
third party libraries. Also switch to checkout-index versus archive so we avoid
using tar.

PR-URL: https://github.com/iojs/io.js/pull/961
Reviewed-By: Trevor Norris <9cb5491eb5770dd8e0bf77a8a0335abf5f0488c5@gmail.com>
Reviewed-By: Ben Noordhuis <59bd0a3ff43b32849b319e645d4798d8a5d1e889@bnoordhuis.nl>
Reviewed-By: Rod Vagg <f9f03903429036ef609ed7ca822fddfa76155c29@vagg.org>

dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node