[Lume] Pull optimizations #60
Description
- Current pulling requires having double the storage space of the image during the reassembling step.
- Downloading and splitting doesn't take advantage of Apple sparse file system. E.g. we are uploading the whole 80GB of the image even though the disk.img might contian 50GB of data only
- Splitting and parallel downloading could be also optimized.
- Reduce log noise.