Auto update on theme package update
Added ido-based completion to magit; by setting magit-repo-dirs, youcan
call (magit-status) even from a non-git buffer
Changed the default theme to leuven for presentation mode; changed
presentation mode font size
Replaced the manual interactive y-or-n-p check with the emacs inbuilt
variable confirm-emacs-kill. Setting this variable instead also helps
preventing accidental emacs kills using the GUI 'X' button.