style slider but dont show it yet
make it an actual module
css organization
minify flatui deps
check in deps
update export function
PNG image export function
PNG Import/Export

Clicking "export" will now generate a PNG image
with voxel data embedded within it using the `lsb`
module.

Drag the image onto the window again to reload
the original voxel shape.
Ignore invalid imported images.
Removed unused argument for exportImage
Merge pull request #1 from hughsk/lsb-export

PNG Importer/Exporter
add drop instructions
Merge branch 'master' into gh-pages
bundle demo