resultmsg changed on Message.java
interface changes:
assign_id included!
add file io
resolv the confilict for MigratableProcess
Merge branch 'master' of https://github.com/Eagles2F/MigratableProcess_2014FALL

Conflicts:
	src/processes/MigratableProcess.java
update for ASSIGNID $ EXIT CMD.
Merge branch 'master' of http://github.com/Eagles2F/MigratableProcess_2014FALL