#392 Proper locale handling

[Eric Raijmakers]

I recently changed my local settings (switched the decimal and thousand numbers separators comma and dot). Then, unit tests started failing.

Should be properly handled and probably indicates an end user problem as well
(using comma as decimal separator should also work properly).

[Eric Raijmakers]

Typical failing example:
ASSERT_EQUALS(Details().getSpeedSpin()->GetValue(), 50.0);

GetValue() returned 5000 (decimal separator ignored)