Add support to Telnet connection

v0.0.4

New version 0.0.4 with support to Telnet connection

Add cli method

Add cli method to execute "copy+paste" from cli

Also:
- Add unit tests;
- Change to use NO_ERROR_MARKER to define no error_marker instead
  of passing argument as None;
- Define types for all arguments;
- Moved run and cli optional arguments to constructor, so they can
  be defined only once on constructor when necessary, or per run/cli
  call when necessary;
- Add options from CoreCli constructor to the Linux CLI constructor.

Signed-off-by: Estevan Vedovelli <evedovelli@gmail.com>