Enhanced visualization of the TranslatorXxxx status.

Hi Dimitri,

The translator.py was slighly enhanced to produce the language.doc (langhowto.html) with bgcoloured status field (and the Language column for the most obsolete translators).

I expect that the Green/Yellow/Red/White status color could motivate the other maintainers to "keep it green". I cannot prove it will help, but we can try :)

Possibly, the language.doc could be deleted from the repository as it is generated from the language.tpl. The later tpl file was also slightly updated.

Have a good time,
   Petr