Update voxel-drop - allow dropping player.dat to load inventories

deathcap/voxel-drop@219b32453d7efbad6e0fa7c86d6dbb77f5b4a165 Shift-drop player.dat to add instead of replacing inventory. Ref deathcap/voxel-drop#3
deathcap/voxel-drop@2f2ab30c75850a36d21992b24a8f39567e495914 Allow dropping MC player.dat files to load inventory into voxel-carry. Closes deathcap/voxel-drop#3

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