Fix python imports in SConscripts

Remove and/or simplify most remaining SENFSCons stuff

Utils/Console: Update completion to use new prefix return value
Utils/Console: Update completion to allow completing command arguments (i.e. help, ls, cd)
Utils/Console: Move auto-repeat-on-empty-return functionality into LineEditor keybinding
Utils/Termlib: Update completer documentation

Utils/Console: Add 'lr' command

Utils/Exception: message() does not include backtrace informations
fixed some documentation

Utils/Termlib: Convert received terminal type string to lowercase (fixes OpenBSD telnet client support)

Utils/Logger: Implement dynmaic targets

Utils/Console: Add '@' to 'ls' output for link nodes
Utils/Console: Path completion in the LineEditor follows links in all cases
Utils/Console: Path completion adds blank space after non-directories

PPI: Fix IntervalTimer unit test

Utils/Console: Ignore trailing '/' on auto-cd
Utils/Console: Add support for STL vector/list arguments and return values
Utils/Console: Set default server name from executable name
senfscons: Don't build SENF automatically in senfutil

Utils/Termlib: Fix completiion semantics

Utils/Termlib: Implement generic completion support
Utils/Console: Provide access to path parsing in CommandParser
Utils/Console: Implement command name completion in interactive console

Utils/Termlib: Implement LineEditor history

Utils/Termlib: Implement terminal setup failure handling

Utils/Termlib: Implement more terminfo error handling

Utils/Termlib: Decouple terminal and telnet dependent code using new AbstractTerminal API
Utils/Termlib: Implement basic terminal navigation commands

Utils/Console: Move telnet functionality to Utils/Termlib
Utils/Termlib: Implement terminfo readier
Utils/Termlib: Implement terminfo based keycode parser