Get rid of eclipse fiels once and for all.
Homogenise the references to crosstool-NG:
- the project is named "crosstool-NG"
- the front-end is named "ct-ng"
- don't use shortcuts (such as "ct-ng" to stand for "crosstool-NG")
Default action is to print help.
Don't speak of make rules when dumping help, just speak of actions.

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