rename arg to --dest

src/main/java/unimelb/mf/client/sync/MFSyncApp.java

src/main/java/unimelb/mf/client/sync/cli/MFCheck.java

src/main/java/unimelb/mf/client/sync/cli/MFDownload.java

src/main/java/unimelb/mf/client/sync/cli/MFUpload.java

...a/unimelb/mf/client/sync/task/CollectionDownloadTask.java

...n/java/unimelb/mf/client/sync/task/FileSetUploadTask.java

...main/java/unimelb/mf/client/util/AssetNamespaceUtils.java

src/main/java/unimelb/mf/client/util/AssetUtils.java

.../unimelb/mf/client/util/collection/CollectionDetails.java

...ava/unimelb/mf/client/util/collection/CollectionPath.java

...va/unimelb/mf/client/util/collection/CollectionUtils.java