Added french typographic non breakable space

[Chimrod]

Here is a code for inserting french spaces following the french typographic rules. (This follow issue #5 wich has been closed when you updated the closed.)

The code use the current locale to check if those rules should apply or not, (see localize function), it allow to define othe specific rules if need.

Tests are ok.

[vincentbernat]

Instead of   with an inline non-wrap style, you could use &nnbsp; (doesn't seem supported in most browsers) or  .