minimal version of html report in mail

[jrichardsz]

In case of error or success, apart from the zip, add the html report to the body of mail only excluding the chart because js is not allowed in the mail body

It should be easy to read the final html and using regex delete the chart and then the resulting string pass to the body of mail

[iSkyNavy]

That feature was implemenented in the branch https://github.com/usil/seleniumjs4all/tree/1.0.1-snapshot