downloadTemplate: fix encoding for working with powershell

#821 exportPPT is broken since 2.x

#764 order :jbake-order: numerical

brushed up docs

#712 - publishToConfluence fails when no hash is available for an uploaded image

#757 - CI: Fix problem in ci-scrip

#20 some wget versions throw errors

#19 the wrapper stops if no java installed but you want to use docker

#18 gradle daemon has memory problems

#696 - exportContributors - not everybody is rendered

#697 - exportToMarkdown docs are not referenced correctly

#714 - Update exportExcel.gradle

#706 - exportEA: Add check if diagrams shall be overwritten

#686 - Add resourceDirs option

upgraded underlying gradle from 6.7.1 to 6.9.2

downloadTemplate: upgraded download plugin

#817 htmlSanityCheck remove dependency to generateHTML

#795 publishToConfluence: added hint for wrong configuration

#756 exportEA: Add two more items for export

#730 "improve this doc" and "create and issue" links

make build output less noisy - use logger instead of println

changed wording of landing page (thanx to Jody Winter)

changed java download hint from oracle to https://adoptium.net/

refactored config file

refactored jbake template "menu.gsp"