Write proper deployment README.html

[sebinside]

Create a proper and good looking readme.html in the deployment files.

Version numbers (framework, api, client, gui) should be generated in the deployment process.

Quick guides, links and information should be available.

See: https://github.com/codeoverflow-org/chatoverflow/blob/2cde2f93003bf007d1f6cfd6c509c3922ae620c8/deployment-files/README.html

[sebinside]

This should also contain an README with wiki link in the plugin dev deployment files.