EmbroiderArt-01-Various

Art made while prototyping the Python port.
Light themed About dialog logo(still need a dark theme)
lightswitchs for About dialog lightbulb.
spool and thread. thread img hue can be changed programmatically for
dynamic effects in a thread color picker.
and about text seperated from light logo so as to overlay
programatically.
Optimized pngs.
Updated .travis.yml file.
Merge branch 'EmbroiderArt' of https://github.com/Metallicow/Embroidermodder into Metallicow-EmbroiderArt
Added experimental Inkscape extension.