In overview.txt, document the two ways of using crosstool-NG: install and --local.
Fix some typos in overview.txt.
Document populate's options, still in overview.txt.
Credit the buildroot people for the patches I vampirise from time to time.

source config/global.in

source config/target.in

source config/toolchain.in

source config/kernel.in

source config/binutils.in

source config/cc.in

source config/libc.in

source config.gen/tools.in

source config.gen/debug.in