scripts/showSamples.sh:
- revert sample dumping to not show the components versions;

docs/overview.txt:
- reorder docs/overview.txt so that configuring comes before running,
- tell about regtest;

Makefile:
config/global.in:
- point to docs/overview.txt for the list of steps;

 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/tools.in

 source config/debug.in