0.13.0

• Revamp heatmap, use interpolated lines to provide a good experience even at high zoom levels.
  • This also fixes the gaps that were present before. GH-34
• Add cache migration functionality.
  • Make sure that cache directory is created beforehand. GH-55
• Split tracks into segments based on gaps of 30 seconds in the time data. That helps with interpolation across long distances when one has paused the recording. GH-47
  • Fix introduced bug. GH-56
• Add cache to heatmap such that it doesn't need to render all activities and only add new activities as needed.
• Add a footer. GH-49
• Only export missing tiles in the active viewport. GH-53
• Add missing dependency to SciKit Learn again; I was too eager to remove that. GH-59