Further detailed doc reformatting

Console: Add autocomplete and autocd options to executor
Console: Add Server::stop member

Console: Remove backtrace from syntax error messages
Console: auto-cd when specifying a directory as command

Console: Add support for read-only 'Variable' commands

Console: First implementation of command argument parsing
doclib: Better doxygen header/footer dependency handling
add missing Console includes

Console: Pass ParseCommandInfo instead of ArgumentsRange to the callbacks
Console: Add named aliases for operator overloads ('[]' and '()')
Utils: Document, where impl/demangle.h comes from
Updated the 'Setting up a new project using SENF' documentation

Utils: Add WrapException template
Utils/Daemon: BUGFIX: Only remove pidfile if we have created one ourselves

Console: Implement OverloadableCommandNode
Console: Make all virtual functions private
Console: Rename ObjectDirectory to ScopedDirectory
Console: Move non-template dependent ScopedDirectory members to ScopedDirectoryBase
Console: Provide owner-less void specialization of ScopedDirectory

Console: Code cleanup
Console: Add automatic node naming

Console: Implement simple online help
Console: Remove uniquify flag
Console: Implement node-active check
Console: Implement node removal
Console: Move 'name' argument consistently to 'add' command
Console: Implement SimpleCommandNode (command with manual argument parsing)
Console: Implement 'add' family of members based on extensible creation helpers

Console: Implement very (very) fundamental node tree
Console: Implement parser