Add central localisation support (currency, decimals etc.)

I have been looking into the Drupal localisation files, and I noticed (well it seems to me) that most localisation is done on an individual component basis (component being a module, theme, etc)

What I would like to suggest is that a localisation pack could support a general settings file (note the "COULD" -- it would be up for the loclaisation authors) that would add some general localisation settings, which could be in an XML file. Some general settings could include:

* Language orientation (left-to-right or right-to-left)
* Default date format (DD/M/YY, YYYY.MM.DD, MM-DD-YY, etc)
* Default time format (HH:MM:SS, H:MM:SS am/pm, etc)
* Currency symbol
* Days of the week localisation
* Months of the year localisation
* Decimal separator (period or comma, etc)
* Measurement system (metric, imperial, etc)
* Temperature system (celcius, ferenheint, etc)
* Localised names of the language (i.e.: how is the language called in other languages besides English)

My view is that these general settings would give Drupal a further boost in its multi-language system. For example:

* A weather module could show the default temperature in Celcius or Farenheint depending on the defaults of the current language.
* Numbers would also show the correct decimal separator and digit grouping (e.g.: 1,000,00 or 1.000,00)
* Ensure that date and times are shown consistently around the Drupal portal, following the default taxonomy and nomenclature

Finally I also suggest that language pack creators could add their custom flag.PNG file on their language pack, which could be used in a graphical language selection menu. I think that localisation flags should really be up to the authors. For example, a Latin American language pack could use a Mexian Flag, or an Argentinean Flag... Is really up to the authors, isn't it?