v0.9.0

• Fixed the preset issue for the legacy Anna (@plamola)
• Made the unit tests compatible with the legacy Anna (@plamola)
• Added the port number in the unit test (@plamola)
• Added some basic unit test for two functions which had no coverage (@plamola)
• Added environment variables in the unit test for the user specific Anna settings (@plamola)
• Added the missing port number in the documentation example (@plamola)
• Some minor code cleanup (@plamola)