updates to release process after v0.40.0
transition: doc preflight/postflight stanzas

a mass change to Casks to come later
Update macdown container layout

Fixes #6075
Add Google Earth Web Plugin
Add JetBrains CLion 138.1965.18
Merge pull request #6074 from rolandwalker/preflight_postflight_transition

transition: doc preflight/postflight stanzas
Merge pull request #6073 from rolandwalker/releasing_updates_0.40.0

updates to release process after v0.40.0
added guitar tuner
Use 2.0 instead of latest for Semulov.app
Merge pull request #6084 from johndbritton/semulov-2-0

Use 2.0 instead of latest for Semulov.app
Merge pull request #6077 from rolandwalker/macdown_subdir

Update macdown container layout
rename delta file and update transition docs

requires #6074 (may show merge conflict)
Merge pull request #6078 from diimdeep/google-earth-web-plugin

Add Google Earth Web Plugin
Update Pandoc to 1.13.1
Merge pull request #6085 from ndr-qef/pandoc

Update Pandoc to 1.13.1
Merge pull request #6082 from vitorgalvao/guitar-tuner

added guitar tuner
added cockatrice
Merge pull request #6081 from vitorgalvao/add-cockatrice

added cockatrice
happygrep: grep with pretty tui
Merge pull request #6080 from diimdeep/jetbrains-clion

Add JetBrains CLion 138.1965.18