Fix running without installing.
Update README.
Point help to the man page.

chmod ct-ng to be executable in the build dir.

./configure gains a help entry.

Merge the build system to trunk: ct-ng is now installable:
- ./configure --prefix=/some/place
- make
- make install
- export PATH="${PATH}:/some/place/bin"
- ct-ng <action>

Better handling of the steps lists:
- new make rulle: liststeps,
- new help entry telling about liststeps,
- update documentation accordingly.

Make the progress bar a default for all samples.

Always call distclean after each sample when doing a regtest.

Update version to -svn.

Prepare to release crosstool-ng-0.0.5.

Rework the help system. For now, this is mostly a no-op (it only re-organise the help entries), but later, that may come in handy when we want ct-ng to be installable).