Issue #401

Survey preview number styling looks strange. Also made it consistent to
the question list bullets in the edit screen
Issue #424 - add requirements documents as markdown files to /doc
Issue #424 - add Maps file in markdown format
Issue #424 - Rename from FlowRequirements to Requeriments
Issue #425 - remove wrong selected survey change

* We set the published status to 'NON_PUBLISHED' when we change the survey
Here, I confused a deleted survey group with a deleted question group.
Issue #426 - only add published surveys to 'all survey' list
Issue #426 - better implementation of select all published surveys
Merge branch 'develop' into release/1.6.6.3