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Single quotes have now higher priority than double quotes
and they can be used together. E.g.

[server]: create 'Name "middle name" surname' 43 im@g31d5tr1ng

will push
    Name "middle name" surname
as the name of the VM to the server

New progress uses a different interface with start and finish methods
that they are now used

Thread inc/decrease is now generic for all clients that might need it
with the method _watch_thread_limit

Algorithm: set a small thread limit and when reached wait for active threads to
finish. Measure avg time. If avg time decreases, increase thread limit
If avg time increases, decrease thread limit.

Usage: in kamaki shell, from any context, user can write:

/<command> <subcmds... and params...>

Idea: in pre: add top level commands as /<command>
slightly different registration

Execs top-level commands but doesn't roll back correctly

shell commands should be accessible from all contexts e.g.:
[kamaki] server   #new context
[server] /config list   #call command from top context
...
[server] ../config list   #call command from previous context

This feature will be developed in following commits

Still buggy and experimental, but if a cli don't use the command
decorator, but implement another way of loading class info to
a _commands list of CommandTrees, kamaki can still use this cli.

This will allow clis to extent CommandTrees in order to provide
commands and command informationon demmand (dynamically)

Test firsth in one-command enviroment
cmd-spec system has been initialized, but not finished

Aims:
- cleaner cli load-point code
- move more argument logic to argument module
- move command loading to the seperate service cli modules:
    each command spec module will provide a mechanism for loading
    command interfaces (all of them or specific cmds)

FEATURE: subcommands of a callable command are not allowed. e.g.:

if the following exist as callable commands:
cmd1_cmd2
cmd1_cmd2_cmd3

then cmd1_cmd2 is resolved, but cmd1_cmd2_cmd3 is not

UNFIXED: There is still a case of syntax-error or --help call where the best
possible help message is not resolved:

cmd1_cmd2_cmd3 where cmd1_cmd2 is not a command

CLI bug: deep-level commands malfunction

wait for server to reach state (e.g. while building)