This commit fixes install of required dependencies for native
extensions.

Also remove c-ares since it's included in libuv now.

libuv version b7b7df090ca285e53eb51bf518c4e5064876596

This can be done in user space. EG https://github.com/cloudkick/whiskey

This reverts commit da9b3340.
This reverts commit b4ff36a4.

Conflicts:

	src/node.cc

Conflicts:
	doc/api/modules.markdown
	test/simple/test-crypto.js

Fixes #1166.

Closes #1173
Closes #1170

For classes defined in the module, this is fine.  For 'Error'
it's probably not very hazardous.  However, testing 'Object'
and 'String' is much more reliable using typeof, to work with
the repl and NODE_MODULE_CONTEXT modes.

INTRO-385

Fixes #1144.