Auto check for code style policy/code errors

[Abbakus]

I would like to auto-execute code style policy and code errors checks to achieve better code quality and avoid common mistakes.

Being install mandatory for executing VB, I would insert common checks into "install.sh" script.

[Abbakus (abbakus)]

Well, I forgot to mention that I will use Pyflakes and Pylint as Pilou suggested in his mail (15/03/11).

[Abbakus (abbakus)]

Implemented on rev 281.

Now when launching install.sh script if the ."bzr" dir is found (always for developer, never for user installing from release packet) you see pylint/pyflakes output.

Notice that we get many: " undefined name '_' " and " Undefined variable '_' ". It is clearly related to l10n. I'll investigate.

[Abbakus (abbakus)]

Fixed the " undefined name '_' " and " Undefined variable '_' " false errors in rev 291.