ISSUE-3731: Moving resize_image() to include/lib/vital_funcs.inc.php
ISSUE-3731: Removing function from themes/simplified_desktop/social/profile_picture.html.php
ISSUE-3731: Removing resize_image() from other files. Function resize_image() in vital_funcs.inc.php returns true if successful, false otherwise.
ISSUE-3731: Adding docblock with the function resize_image().
Merge pull request #59 from geetakshi/ISSUE-3731

Issue 3731: Moving resize_image() to include/lib/vital_funcs.inc.php