A fix and a test case for gh-125: fiber cancel by numeric id.

Update the user guide.
gh-201: cpuid.h is gplv3. Prepare for removal of cpuid.h
gh-201: remove gplv3 cpuid.h from the source

Fix a build warning on FreeBSD i386
gh-148: fix a failing small_alloc.test on 32 bit platforms.
gh-148: fix a failing base64.test on 32-bit platforms.

The bug was in the test itself - lack of trailing 0
at the end..
Merge remote-tracking branch 'origin/stable'

Conflicts:
	doc/user/stored-procedures.xml
	src/lua/init.cc
	test/box/fiber.result
	test/box/fiber.test
	test/unit/fiob.c