dired: mode map update
keys: C-c C-f removed

because it conflicts with eshell's bindings
load: cfg relocation / cleanup

- small stand-alone configs are eliminated
- obsolete Emacs configuration backup routine is removed
- several files from loadable directory are moved to cfg
- module load routines are improved a little
flyspell: clean-up

language detection is removed, should be replace by the
auto-dictionary mode in future