* init-info.el: use `when' instead of `if'

Signed-off-by: Yakkala Yagnesh Raghava <hi@yagnesh.org>
* init-windows.el: new defun previous-buffer-in-other-window.

Signed-off-by: Yakkala Yagnesh Raghava <hi@yagnesh.org>
* init-utils.el: new defun wikipedia-browse

Signed-off-by: Yakkala Yagnesh Raghava <hi@yagnesh.org>
* init-scheme.el: guile setup

Signed-off-by: Yakkala Yagnesh Raghava <hi@yagnesh.org>
* init-perl.el: use perl-mode instead of cperl-mode

Signed-off-by: Yakkala Yagnesh Raghava <hi@yagnesh.org>