[a] Add Slackware support
[update] Add support for compiling .el files
[emacs] Fix various compilation warnings.

The only thing that's left is:

In end of data:
init.el:1782:1:Warning: the following functions might not be defined at
    runtime: ac-config-default, folding-point-folded-p, folding-show-all,
    folding-use-overlays-p, folding-show-current-entry, folding-shift-in,
    folding-narrow-to-region, folding-open-buffer, folding-add-to-marks-list,
    folding-mode-add-find-file-hook

which I could not figure out.