Scribus plugin to fix text typography according to french rules... Adds "add non breaking thin space" before double signs

Specifications inspired from : https://wiki.openoffice.org/wiki/Non_Breaking_Spaces_Before_Punctuation_In_French_(espaces_ins%C3%A9cables)

• carefull not to change urls as http://etc.usw?so=on
• dont change repeated glyphs as !?!!
• dont change when there is a tab before

• choose a text frame, launch script
• choose langage
• choose sort of space to add for typography : default is thin nonbreakable space.
• choose whether existing spaces should be replaced or not

• replaces " with « and » as required
• warns when « and » dont match or for other such issues
• adds choosen spaces after « and before »
• applies some heuristics (some would call that AI) to best deal with ' and "
• when langages is french, does more typography job :
  • replaces or adds the choosen space before ! ? ; : and …
  • doesnt mess urls = doesnt change http://scribus.net
  • only adds one choosen space before a set of double ponctuations as "!!!?!"

• recognizes urls with "p:/" pattern : it matches http://... but there could be false positive
• same choosen space for « » ; ! ; : …
• space is added or replaced with absolutely no local font awareness