[EFL][WK2] Minibrowser : Shift+Scroll navigate to back or forward url's
https://bugs.webkit.org/show_bug.cgi?id=136698

Patch by Tanay C <tanay.c@samsung.com> on 2014-09-10
Reviewed by Gyuyoung Kim.

* MiniBrowser/efl/main.c: Add functionality to support shift + mouse scroll navigation
(on_mouse_wheel): Added.
(window_free):
(window_create):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@173508 268f45cc-cd09-0410-ab3c-d52691b4dbfc