Evaluate automation tools for automated accessibility checking

[silentHoo]

One important part of software engineering is to automate repetitive tasks which are time consuming and error prone when done by hand. This is espacially important for testing.

This issue refers to evaluating available tools and services suited to test accessability.

Acceptance criteria

• There is a list of online services that can be used for open source projects (for free)
• There is a list of libraries that can be used for open source projects
• It is discussed and set which service or library fits our needs the most