Map layer names one to one and allow Dwgs, Cmts and Eco layers

[kasbah]

Using the exact layer names in Inkscape would allow you to choose front or back from your drawing. Additionally we should allow the Dwgs, Cmts and Eco layers (KiCad 4.0.7 seems to load them without complaints).

So the table from the README would become:

Inkscape layer name	KiCad layer(s)	KiCad legacy	KiCad pretty
F.Cu	F.Cu	Yes	Yes
B.Cu	B.Cu	Yes	Yes
F.Adhes	F.Adhes	Yes	Yes
B.Adhes	B.Adhes	Yes	Yes
F.Paste	F.Paste	Yes	Yes
B.Paste	B.Paste	Yes	Yes
F.SilkS	F.SilkS	Yes	Yes
B.SilkS	B.SilkS	Yes	Yes
F.Mask	F.Mask	Yes	Yes
B.Mask	B.Mask	Yes	Yes
Dwgs.User	Dwgs.User	Yes	Yes
Cmts.User	Cmts.User	Yes	Yes
Eco1.User	Eco1.User	Yes	Yes
Eco2.User	Eco2.User	Yes	Yes
Edge.Cuts	Edge.Cuts	Yes	Yes
F.Fab	F.Fab	--	Yes
B.Fab	B.Fab	--	Yes
F.CrtYd	F.CrtYd	--	Yes
B.CrtYd	B.CrtYd	--	Yes

[NaH012]

My pull request #26 does this, If you are interested you could test my branch of this project.
The owner doesn't look very active anymore so I have no clue how long it will take for this to be merged.

[kasbah]

Thanks, I am now using svg2shenzhen as it's a better workflow for me and has all the layers mapped one to one.