Add middle click & option to exit in documentation
Remove some warnings
Remove option SaneSortOrder

It's useless, since GTK3 actually has an option of its own for that
Update French translation
updater: Change the way expander behave

It wasn't very nice whenever the paned position was changed, with regards to
resizing the toplevel window. Now it won't resize it, and should remember the
last used positions (expanded & collapsed).

Still not perfect, but better.
kalu-dbus: ALPM_QUESTION_LOCAL_NEWER was removed from ALPM

Also following constants were "re-indexed" so a recompile was due w/ pacman
4.1.1 to reflect those API changes.
preferences: Reset timeout for next auto-checks after a save
Bump to 2.1.0; Update HISTORY