* doc updates, pr / issue templates

* adjusted markup

Update the "host machine OS" description to be more appropriate for mobile devices.  Instead of mentioning Linux or Windows, ask the user to tell their Mobile device and Android version

Co-authored-by: Hee Tatt Ooi <hee.tatt.ooi@sap.com>
Co-authored-by: Jakob Möller <jakob.moeller@sap.com>
Co-authored-by: harambasicluka <64483219+harambasicluka@users.noreply.github.com>
Co-authored-by: marcmuschko <marc.muschko@sap.com>

Co-authored-by: Hee Tatt Ooi <hee.tatt.ooi@sap.com>
Co-authored-by: Jakob Möller <jakob.moeller@sap.com>
Co-authored-by: harambasicluka <64483219+harambasicluka@users.noreply.github.com>
Co-authored-by: marcmuschko <marc.muschko@sap.com>

* updated pr template

* updated readme

* adjusted pr checklist

* adjusted pr template

* Update pull_request_template.md

* Removed Link to Contribution Guidelines (added by Github on the right hand side, anyhow)
* Removed Link to issue #41 from title example (this has been linked quite a lot...)

* 0.5.6

* Fix typo

Co-authored-by: Jakob Möller <jakob.moeller@sap.com>
Co-authored-by: harambasicluka <64483219+harambasicluka@users.noreply.github.com>
Co-authored-by: marcmuschko <marc.muschko@sap.com>