* remove unuseful param from the dialog
number of imported glyphs is not useful for font maker, they want all of them.
* Update lettering_svg_font_to_layers.xml
* Update lettering_svg_font_to_layers.py
when we get a glyph from the Private Unicode Area, the entry point has no meaning, but hopefully we can get some good information from the glyph_name
* Update font_info.py
kerning information must be associated to the right nanme glyph layer in case of PUA letters
* remove commented code
* combining glyphs are guessed
* attribute letter seems ok now
* Update option_panel.py
should not have been modified
* second round
* step3
* add sorting whole file by categories
* style
* Update tags.py
remove an unuseful tag
* fixing mistakes pointed out by Kaaleen
thank you Kaalleen
* first steps
* Update lettering_svg_font_to_layers.py
* add more user parameters
* Update lettering_svg_font_to_layers.py
* round the horiz_adv_x
* remove scoriers
* better handle the case when the reference glyph is not in the font