* refactor planning into task detection
* refactoring worker tasks
* refactor
* compiles, but only balance task is registered
* compiles, but has nil exception
* avoid nil logger
* add back ec task
* setting ec log directory
* implement balance and vacuum tasks
* EC tasks will no longer fail with "file not found" errors
* Use ReceiveFile API to send locally generated shards
* distributing shard files and ecx,ecj,vif files
* generate .ecx files correctly
* do not mount all possible EC shards (0-13) on every destination
* use constants
* delete all replicas
* rename files
* pass in volume size to tasks
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