[#62358298]

* open-linux-62358298:
  Add Linux open
added marketing.yml, included fields in publisher

[#62649624]
Merge branch 'master' into marketing-62649624
marketing.yml: added html to media; custom content section

[#62649624]
marketing.yml, changed marketing_content field name

[#62649624]
saner price option code defaults; version bump

[#62649624]
Merge branch 'master' into manifest-missing-file-62423444
Remove some unused code
Add support for custom.css

[#62802682]
Get custom.css working with local server

[Delivers #62802682]
screencast handling updates
Merge branch 'master' into marketing-62649624
web cover
Merge branch 'marketing-62649624' of github.com:softcover/softcover into marketing-62649624
Fix uploader message and cp marketing.yml if necessary

[Delivers #62862638 #62872772]
Merge branch 'marketing-62649624' of https://github.com/softcover/softcover into marketing-62649624
Remove unneded references to the cover file

[Delivers #62857924]
Issue pull request for branch ax-cover-config-62857924

[Delivers #62857924](https://www.pivotaltracker.com/story/show/62857924)
Properly mock out the publish! command

[#62649624]
Move book.yml to config

[#62649624]