Updated Filer Server API (markdown)

Filer-Server-API.md

@@ -43,6 +43,7 @@ Examples:
 > curl  "http://localhost:8888/javascript/report.js"   # get the file content
 ...
 > curl -F file=@report.js "http://localhost:8888/javascript/new_name.js"    # upload the file with a different name (The local report.js becomes new_name.js on the server side.)
+> curl  http://localhost:8888/test.yaml --upload-file test.yaml  # upload file by PUT
 {"name":"report.js","size":866,"fid":"3,034389657e","url":"http://localhost:8081/3,034389657e"}
 > curl -H "Accept: application/json" "http://localhost:8888/javascript/?pretty=y"            # list all files under /javascript/
 curl -H "Accept: application/json" "http://localhost:8888/javascript/?pretty=y"