Merge pull request #189 from nuest/dev

added an extra block on about page, fixes #185
Update lang_en.php

Updated About blocks. Added text to app block
Update lang_en.php
This fixes issue #190
added text to AGOL block
added text to AGOL block
remove php short tags
add missing "
add links to AGOL portal
updated part of the language: Sie-> Du
enviroCar plattform and  Die App texts updated
inserted Bold text
deleted excess text
updated FAQ w/ iPhone XY
corrected spelling
"Mach mit..." with "Du"
revised enviroCar - so ghet's
Merge remote-tracking branch 'upstream/dev' into dev
add app image for about page
add app image on about page