Add empty file to keep WorkcraftRunner/src/
Add empty file to keep WorkcraftRunner/src/

This directory is needed by Eclipse. Will be removed in the future.

danilovesky/workcraft,tuura/workcraft,tuura/workcraft,jrbeaumont/workcraft,workcraft/workcraft,workcraft/workcraft,jrbeaumont/workcraft,jrbeaumont/workcraft,danilovesky/workcraft,workcraft/workcraft,workcraft/workcraft,danilovesky/workcraft,tuura/workcraft,danilovesky/workcraft