Added follow-dir-links option

docs/unimelb-mf-check.md

docs/unimelb-mf-download.md

docs/unimelb-mf-upload.md

pom.xml

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

src/main/java/unimelb/mf/client/sync/settings/Settings.java