Pass the merge table to the WebGL shaders using two textures (keys, values).
Merging logic on the shader in place but not working yet.
Playing around with the non-working merge functionality on the shaders.
Merging on the shaders works for at least 1 merge :P.
Merging multiple labels works now on the shaders.
Thinner lines for merged labels.
Borders now fully work. Also re-organized fragment shader code.
Merge branch 'webgl_merge'