[#751] Update release docs
[#751] Move and update release process docs

Updated version from the ones currently on the wiki.
[#824] Adds correct flags for sweden, slovakia and slovenia
[#827] Adds  to button for full ga integration
[#751] Edit the release cycle docs
Merge branch '751-release-docs'
[#838] Postgres error codes are five character strings, not integers
Merge branch '838-pgcode-string'
Merge branch '827-ga-fix'
Merge branch '824-flags'