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

fix traceback when typing enter with history disable (method Printer().ask())
clean quit on server disconnect
prompt in color
add login in prompt
new cli exceptions class
proper handle auth failure