v0.2.0

• added multiple CLI arguments for setting up the scene (refresh-rate,
  globe-rotation, cam-rotation, cam-zoom, location, focus-speed,
  night, template, texture, texture-night)
• added experimental listing mode that supports reading coordinates from
  standard input and going through all of them, animating camera target changes
  (see --pipe)
• enabled ability to display night side of the globe using an additional
  texture
• changed default Earth texture (now includes New Zealand)
• added vim-style navigation for the interactive mode
• improved internal library representation of Texture
• improved documentation