Moler

Added
* Publisher class - Moler implementation of Publisher-Subscriber Design Pattern
* Iperf2 command publishing intermediate reports to all subscribed "observers"
* AT commands:
* at(AT)
* attach(AT+CGATT=1), detach(AT+CGATT=0), get_attach_state(AT+CGATT?)
* get_imei(AT+CGSN)
* get_imsi(AT+CIMI)
* get_manufacturer_id(AT+CGMI)
* get_revision_id(AT+CGMR)
* moler_serial_proxy tool proxing between serial connection and stdio/stdout
* AtRemote device being state machine capable to reach AT_REMOTE state and issue AT commands
* (controlling AT console available over serial connection on remote machine)

Improved
* CommandTextualGeneric may set direct path to command executable
* (f.ex. OS may default 'iperf' to '/usr/bin/iperf' but user wants '/usr/local/bin/iperf')

Fixed
* ConnectionObserver, AbstractDevice were unable to be used inside multiple inheritance

Fixed
* SSH regex for fingerptint prompt

Added
* Termianl binary debug

Improved
* CI pipeline
* ls command

Changed
* Redefined timeout for telnet and ssh
* RegexHelper checks if parameter is not None

Changed
* connection name returned by iperf2 uses "porthost" format to not confuse on IPv6 (fd00::1:0:5901 -> 5901fd00::1:0)

Deprecated
* `config_type` parameter of `load_config()` is not needed, configuration type is autodetected

Added
* possibility to enable/disable logging each occurrence of event
* backward compatibility for load_device_from_config()

Fixed
* device closing (dev.remove() method) fails if device was already closed

Added
* force Unix device to return into local shell when device is closing (that would close ssh if was open)
* allow adding devices after initial load of configuration
* new UNIX command handled by moler: **devmem**
* iperf command refactored into iperf2 command

Fixed
* wrong iperf bandwidth calculation when bandwidth displayed in Kbits/sec, Mbits/sec, Gbits/sec
* first moler prompt to catch
* removal of new line characters on some connections

Deprecated
* stop using Iperf command from moler.cmd.unix.iperf; use Iperf2 from moler.cmd.unix.iperf2 instead