use "creature/pkg-active" manage packages manually

- replace "add-pkg-in-pkg-dir" (recursive load-path scanning) with a
  central "creature/pkgs" registry that handles load path, autoloads,
  info dirs and dependencies
- adapt all init-*.el files to the new activation function
- add a top-level Makefile to byte-compile site-lisp packages
- remove unused "emacs-kv" and "emacs-db" submodules

.gitmodules

@@ -193,12 +193,6 @@
 [submodule "site-lisp/esxml"]
 	path = site-lisp/esxml
 	url = https://github.com/tali713/esxml.git
-[submodule "site-lisp/emacs-kv"]
-	path = site-lisp/emacs-kv
-	url = https://github.com/nicferrier/emacs-kv.git
-[submodule "site-lisp/emacs-db"]
-	path = site-lisp/emacs-db
-	url = https://github.com/nicferrier/emacs-db.git
 [submodule "site-lisp/edit-indirect"]
 	path = site-lisp/edit-indirect
 	url = https://github.com/Fanael/edit-indirect.git