2.9

• Improve support for tiled maps. Add MBTiles support. Now ms2view and ms2render can use mbtiles as input map format,
  ms2render can render tiles directly to mbtiles.
• Support for Finnish standard maps (e.g. V51) and Finnish grid.
• Rewrite map rendering scripts (vmap_data/scripts). Direct rendering to mbtiles. Update map data. Important fix of Garmin TYP file.
• Add ms2view desktop (#70, thanks to sikmir)
• Fix and improve contour rendering and smoothing (image_cnt module, ms2geofig program)
• vmap2:
  • allow larger type numbers (3-bytes instead of 2)
  • new features for rendering vmaps: "grid_labels", "draw_pos fill"
  • add a few functions for custom map filtering
  • support for objects types > 0xFFFF
• write_geoimg:
  • mbtiles support
  • default background: transparent for tiled maps, white for others
  • add --fillcolor, --zfill, --swapy options
• viewer:
  • Objects can check drawing range, in advance. This is used in tile rendering to avoid reading/creating tiles which are not needed
    (#61).
  • Get rid of prepare_range mechanism. It was an attempt to do parallel downloading of tiles, but it ignored caching and did a lot more additional work. Now tile downloading is requested one by one, during rendering.
• geo_mkref:
  • rearrange code, move creation of individual reftypes to separate functions
  • fix --border_file option for multi-segment tracks
  • move geo_mkref module inside geo_data
• geom:
  • rect_to_line for empty rectangle gives empty line instead of exception
  • line filtering with Ramer-Douglas-Peucker algorithm
• conv: fix ConvBase::frw_acc for conversions with different x,y,z scaling (such as geo projections)
• image: fix error in coordinate range check
• shape:
  • fix reading objects with nParts=0
  • add shape_dump program
  • add methods for getting dbf field parameters
• pulkovo grid: fix zone boundaries
• rainbow: return lowest color for NaN value
• filename: add ls, glob, remove wrappers
• module system: fix multi-threaded builds (#69)
• geo_data: fix error in writing Ozi map reference
• jnx module: a playground for jnx format