Unread items to be readable from oldest to newset

Added new config parameter (unread_order) to be able to read unread
items from oldest to newest
Add support for fullscreen Webapp on iPhone 5

Refers to Issue #409 where the Webapp on an iPhone 5 started from
Springboard starts letterboxed.
Fixes #362

While importing feeds from OPML check whether a source with same
title, spout and url is existing to avoid creating duplicate
sources.
Fixes #401. Prevents a reflected XSS vulnerability in search field.
Update reddit2.php
fix 'Undefined Index' error in item tpl when no shares available
preg_replace /e is deprecated in php5.5
preg_replace /e is deprecated in php5.5
preg_replace /e is deprecated in php5.5
wider touch area for the settings icon
Merge pull request #419 from silentboatman/toucharea

Wider touch area
Merge pull request #416 from amiga23/master

Fix for Issue #411: preg_replace /e is deprecated in php5.5
Merge pull request #415 from venyii/noshare-fix

Fix 'Undefined Index' error in item tpl when no shares available
Merge pull request #414 from dz0ny/patch-2

Add multi reddit support
Merge pull request #413 from tamizhgeek/master

Fixes #362 and #401.
Merge pull request #410 from darkside40/master

Add support for fullscreen Webapp on iPhone 5
Merge pull request #403 from lamarios/master

Unread items to be readable from oldest to newset
update README.md
fix $this bug in a few spouts
Fixes #402 : Prevent stored XSS vulnerability in the source add form