JRE support

[xorye]

JRE path can now be detected automatically. This was tested on a machine with JRE, but without JDK.

This PR branch was initially taken from #136 .

Signed-off-by: David Kwon dakwon@redhat.com

[fbricon]

Please also update the readme

[xorye]

Updated. Does this suffice?

[xorye]

On second thought, I will add some more information.

[fbricon]

OK this work but i found an issue with the code you changed from ef91528#diff-baff02b04010a735985f63100efb9fc2L37:

each case is checked even after the java home path has been found. For some reason, it doesn't cause an error because apparently the 1st call to resolve wins. The old code, albeit uglier, used to better handle one case after the other

[xorye]

Yes, that was one of the benefits of the previous version. It turns out that when resolve() is called, it still executes everything else after it, but the first resolve is always the result that the promise returns. Do you want me to change it back to the previous way?

[fbricon]

Yes please

[xorye]

I have reverted it