Merge branch 'restructure' of git.xx.network:elixxir/client into restructure

bindings/fileTransfer.go

cmd/fileTransfer.go

cmix/interface.go

fileTransfer/batchBuilder.go

fileTransfer/callbackTracker/callbackTracker.go

fileTransfer/callbackTracker/callbackTracker_test.go

fileTransfer/callbackTracker/manager.go

fileTransfer/callbackTracker/manager_test.go

fileTransfer/delayedTimer.go

fileTransfer/ftMessages.proto

fileTransfer/interface.go

fileTransfer/listener.go

fileTransfer/manager.go

fileTransfer/manager_test.go

fileTransfer/oldTransferRecovery.go

fileTransfer/oldTransferRecovery_test.go

fileTransfer/partTracker.go

fileTransfer/processor.go

fileTransfer/receive.go

fileTransfer/receiveNew.go