Bidi-language Support

[tmr232]

Add support for RTL languages.

[tmr232]

This is mainly a Chrome bug. It messes with the line order.
Till it is fixed - there is a simply hack to overcome this.
Wrap each <tspan> element in the <text> element in a <text> element of its own. This does the trick.
The misalignment of punctuation can be solved in the script as well be some string manipulation.
Probably best to add an 'rtl' flag to the script.

[tmr232]

Also, both Chrome and FF show Hebrew in a position diffrent than Inkscape.