fix example
Add startSilk. Extract classes to new files
Removed ClusterManager
Reproduced the error that SilkEnv is not initialized
Add test trait outside Silk cluster for emulating a situation that a user write and send a program to a silk cluster
Bypass ZooKeeperClient, ActorSystem etc. by enclosing them in *Env class
Let the class box have address and port number to simplify the download code
Fix the point to retrieve the sorting result
Remove an old version of asm library included in jetty
Bypass default log level to Silk clients. Register ClassBox in local DataServer
update submodule
Removed PreSilkCommand, which becomes unnecessary thanks to a recent update in IntelliJ
Add command execution test
Add cpu and memory requriement information to CommandOp
fix makefile example
Draw CallGraph for CommandOps
fix note
Comment out recursive call graph traversal
Fix refID of FContext
Implement input function in CommandOps