Separate expressions from field calculator, improve
Add option to filter shapes on an expression
Add tests for filter and field calculator
Add subdivide() to recursively split layers
Generate file index when exporting multiple layers
Improve --pct error message, accept --pct 0 and --pct 1
Add tests for -p 0 and -p 1
Update help menu and option parsing
Reorganize exporting code
Fix dissolve crash with some abnormal topologies
v0.1.12 adds expression, split, filter and subdivide commands