Commands loading is now done by crawling commands directory under cccli module.
All command which starts by Commmand_ and which is a son of Command class are candidate.

Introduce new class RemoteCommand, which help checking needed remote functions are available
before adding a command to list of commands

Starting support of title color in tagdisplay system

now export tag uname

fix syntaxt error on get_tags

expert has its own history

remove global --force-yes options

I change this because Proxy Remove RPCError exception in some case and this create a complex exception handling

fix ctrl+d bug in cmd start (and others)

fix command history traceback

fix somes exception issues