Create installers with the JRE bundled

[ursjoss]

For older versions of ThinkingRock, the user could choose between installers that bundle the JRE and those that don't.

I didn't check, but i believe recent versions do not have the option of the bundled JRE - except for Mac installations. And there we (temporarily) removed that in #35.

It would be ideal to offer all installers with the jre bundled and optionally also w/o it.

See: https://netbeans.apache.org/tutorials/nbm-nbi.html