How you can help section in Readme.md

Added a How you can help section to the readme. 
Update README.md
Update README.md
Update README.md
Update README.md
Added acknowledgement of ONRG and ADL Co-Labs
Merge pull request #198 from evangelia-mitsopoulou/master

Mobler Cards Version 2 beta Layout/Multiple LMS Selection/Landing Page
remove old android cordova
commented div container in the last 2 li items of statistics view, in order they are displayed properly.
clear code in featured courses backend
no actual change
no actual change
pass session key and active url as argument when triggering the sent statistics to server
added comments
keep trying to solve #208
renamed internet connectivity events so that their names to the same with the ones triggered in connection state model
renamed internet connectivity event so that it compliant with the one triggered in connection state model
removed unused commented code
no actual change
removed featuredQuestions.php, the loading of questions for featured content is done in featuredCourse.php