set locale nl_NL

When locale is set to nl_NL (number notation is different, 347,50 instead of 347.50 ),Active record insert doesn't escape 410583,04 as “410583,04”. This results in an insert query with a value like , 347,5, and the insert fails.

As mentioned in the old thread https://ellislab.com/forums/viewthread/224622/

this is my first bug post ever, so correct me if needed.