Add centroid and proximity calculations for polygons
Fixes for expressions
Add ability to aggregate arcs after polygon dissolve
Support multiple source files (processed independently)
Reduce objects created by dissolve, comments
Fix: getMultiShapeBounds() handle null shapes
Add DataTable#addField() method
Fix MapShaper.filter() bug
Add verbose message for field calculator
Fix layer names when splitting on numeric fields
Add support for importing multiple files
Add new features and fixes to command line tool
Handle NaN and null in numeric dbf fields
Update file merging
Implement joining fields from dbf or delim files
Add joining and recent fixes to comman line script