Add Dircolors
Add helper function for cleaning up Org files from DONE entries
Add a newsgroup rule for gnus-alias
Customize hl-line face for Group and Summary buffers
Don't enable Flyspell on Text files (only on Org files)

This is probably temporary, and only for performance reasons.  Indeed, turning
on Flyspell in Text modes enables Flyspell in temporary files during Org export
(in particular, at least in file.html when exporting file.org to HTML).
Invert ~ and = markups

Add as well code to jump to symbol definition (face, variable of function) when
S-RET'ing.