fix sequence diagram that wrongly shows GET requests being broadcast …

…pushed

mark this as version 2.2.1-d2-pre3

clearer wording for how to respond to charging preferences PUT

First draft of OCPI 2.2.1

OCPI 2.2-d2 release

Generated 2.2 without draft watermark

updated RC2 with EU projects and added eichrecht to introduction

Update README.md

Created OCPI 2.1.1-d2 RC1

Release Candidate 1