Geometry Checker
Improve error handling
Reassign holes when splitting polygons
Add missing /Factory/
Add missing Q_OBJECT macros
Add configurable tolerance value
Fix angle checker bug, improve robustness
Guess initial output directory from directory of current layer if possible
Fix bug when updating errors
Initially select 'new layer' option
Angle checker, duplicate nodes checker: fail to fix if resulting polygon has less than three nodes
Logic fixes