macOS-based versions: Eclipse.app is not runnable

[maxkratz]

See #44 (comment).

Currently, the Eclipse.app (macOS-based version) isn't directly runnable after downloading it.
Workaround:

• Open a terminal on your Mac.
• Navigate to the folder containing the downloaded Eclipse.app.
• Run the following command (which will prompt you for your password): sudo xattr -cr ./Eclipse.app

[maxkratz]

This issue will be closed by #104 (=documenting the issue(s) and the respective solution(s)).

As far as I understand, the issue lies within the code signing of apps on macOS, which we cannot support. (Even if we want to sign our Eclipse.app, the signature will break as soon as a single file within the application changes - e.g., when Eclipse crashes and writes a small log file in its configuration plug-in.) We cannot circumvent this.

[maxkratz]

Closed via #104.