Update strings.js

translation update
Merge pull request #42 from ahoj1234/patch-10

Update strings.js
change text-direction into rtl for Arabic
update version to 2.3.1
exclude https://secure.ingdirect.fr (thx terdale)
restore timeout
== -> ===
modern scroll 2.3.1 beta
Arabic translation update (thx @netmain)
limit onDOMNode-checks to once per 300ms
add version 2.3.1 changelog
modern scroll 2.3.1 RC
add readystate-listener
modern scroll 2.3.1
PT update