v0.9 release of Board at Desk - Single dev

Issue Background

Beta version of Board at Desk - Single dev was released on Feb 22nd. The release of the 0.9.1 version is planned on ---

Issue description

In order to release v0.9 we need to:

• Declare Gold Master #85 (closed)
• Deploy Gold Master #86 (closed)
• Improve documentation #38 (closed) , #39 (closed) , #40 (closed) , #44 (closed) , #45 (closed) , #72 (closed), #74 (closed), #88 (closed) #95 (closed)
• Release announcement: #41 (closed)
• Marketing campaign material: #90 (closed)

After this task is done, task #89 (closed) should start.

Acceptance criteria

• link to the release announcement (wiki version and mail version) Check the links in #41 (closed)