Make use of the patterns in Intl number formatting

Make use of the patterns in Intl number formatting

This adds code to parse and use the information from the pattern
string used to create a NumberFormat. It adds tests taken 
from the Closure tests and also tests comparing a simple
format to the ICU output for a large set of locales.

In addition it has changes to
 - part number_format.dart in intl.dart rather than having it as a
separate library
 - Update the algorithm to incorporate some additions in Closure
 - Allow setting a few of the internal parameters, which the 
Closure tests wanted to use
 - Add named constructors for the standard formats, e.g. DECIMAL_FORMAT
 - Access _defaultLocale consistently via the getCurrentLocale() method
rather than directly, so it can never be uninitialized.
 - Regenerated the locale data

Committed: https://code.google.com/p/dart/source/detail?r=21166

[Emily Fortuna, 2013-04-09 19:39:15]

lgtm! whew! :-)

https://codereview.chromium.org/13814018/diff/2001/pkg/intl/lib/number_format...
File pkg/intl/lib/number_format.dart (right):

https://codereview.chromium.org/13814018/diff/2001/pkg/intl/lib/number_format...
pkg/intl/lib/number_format.dart:131: NumberFormat.DECIMAL_PATTERN([String
locale]) :
personal preference: I'd prefer the name of these named constructors to be not
in all caps for dart style consistency, but I can be persuaded otherwise.

https://codereview.chromium.org/13814018/diff/2001/pkg/intl/lib/number_format...
pkg/intl/lib/number_format.dart:546: throw new FormatException('Too many
percent/permill');
nit: can't you make these error messages specific ("Too many percent.") since
you have a PERCENT branch and a PERMILLE branch?

[Alan Knight, 2013-04-09 19:58:27]

https://codereview.chromium.org/13814018/diff/2001/pkg/intl/lib/number_format...
File pkg/intl/lib/number_format.dart (right):

https://codereview.chromium.org/13814018/diff/2001/pkg/intl/lib/number_format...
pkg/intl/lib/number_format.dart:546: throw new FormatException('Too many
percent/permill');
On 2013/04/09 19:39:15, Emily Fortuna wrote:
> nit: can't you make these error messages specific ("Too many percent.") since
> you have a PERCENT branch and a PERMILLE branch? 

I think I can't, because one of the error cases is to have a PERMILLE followed
by a PERCENT, or vice versa, and all we know is that the multiplier has already
been set. We could guess based on the value, but that starts getting very
fragile.

[Alan Knight, 2013-04-09 19:58:48]

Committed patchset #3 manually as r21166 (presubmit successful).