Update lang_en.php
fix HTML validity of about page, add new block for app
Merge pull request #202 from nuest/dev

fix HTML validity of about page, add new block for app
Update lang_en.php

removed sentence re: stable version due end of 2013.
added the mailto in $faq_a5
fixed contact
corrected link
changed links in get involved
Merge pull request #204 from enviroCar/dev

Dev