Added new earth textures, corrected coordinate math.
Messy rush to add a time slider affecting the visualization time.
Removed d3 dependency.
Moved controls to included html and a new class with its own css file.
Merge branch 'time-slider'
Moved earth mesh to a new file, tweaked blending.
Moved particle creation to a function.
Moved renderer and scene up to chronographer, chronodata is only particles.
Test drawing a spline between points.
Started adding cardboard effects and scripts.
Added volcanoes example, projection math and date display need tweaking.