Color fonts, fixes, and improvements

Background

I have updated the tool to the current versions of Haxe and fonthx, which allows it to utilize some of the new, delicious, features.

Additions

• There is now support for color fonts!
  Fonthx uses SVG color fonts for this, support for which varies - e.g. on my machine these work in Firefox, but not Chromium.
• You can now choose output format between TTF and OTF.
• You can now opt to use a simpler algorithm for tracing shapes, which produces bigger TTF files, but supports glyphs like ☉ (a shape inside a hole inside a shape)
• There is now (inside the menu) an option to process multiple pairs of image and JSON files at once
• A German translation
  I thought that someone had also sent me a Polish translation, but I cannot find it. If that was you and you’re reading this, please send it again.

Improvements

• I reorganized the UI to leave more space for text on controls
• The UI now automatically takes up the available page width
• Moved less-common controls to a drop-down menu

Fixes

• Fixed image color mode detection failing for some images
• Fixed some oddities with glyph info overlays in Firefox

Known issues

• Versions are currently marked as 1.0 because the way version information is stored has changed in fonthx and I have to redo my code.