fix merge_nested
fix merge_nested

teharrison/AWE,MG-RAST/AWE,MG-RAST/AWE,MG-RAST/AWE,teharrison/AWE,MG-RAST/AWE,teharrison/AWE,teharrison/AWE,wgerlach/AWE,MG-RAST/AWE,teharrison/AWE,wgerlach/AWE,wgerlach/AWE,wgerlach/AWE,wgerlach/AWE,wgerlach/AWE,MG-RAST/AWE,teharrison/AWE