Minor change in Editor::drawMaskSafe
Trace unknown scancodes in allegro/src/keyboard.c
Enable "remove layer" command to remove all layers

We can remove all layers anyway from timeline selecting a range of layers.
Fix crash in "go to" commands, don't access to null layer
Update TODO.md
Add dummy src/iff/ directory, this will be the module to load/save docs
Add she::EventQueue to she::Display to get events from she library
Move drop files event to she library
Add README.md to src/modules/