Add import, import-raw and export usages

Author: kseo

src/index.ts

@@ -146,6 +146,12 @@ program.on("--help", () => {
     cckey list -t asset
 
     cckey delete -t platform --address "tcc..."
+
+    cckey import UTC--2018-08-14T06-30-23Z--bbb6685e-7165-819d-0988-fc1a7d2d0523 -t platform --passphrase "satoshi"
+
+    cckey export -t platform --address tccqz76va4lh6dwkuwetmfrcgpn852emyq9hvjuksfg --passphrase "satoshi"
+
+    cckey import-raw -t platform a05f81608217738d99da8fd227897b87e8890d3c9159b559c7c8bbd408e5fb6e --passphrase "satoshi"
 `);
 });