Switch to jython 2.5.3

* Allow to drop JNA 3.2.x which is buggy on Windows (it's fixed by
 https://github.com/twall/jna/commit/71de662)
* Use "standalone" package to simplify jCAE packaging
* Add a patch to make standalone jython bootstrap faster
* WARNING: java wildcard import in .py no longer work
[Amibe] Improve some exception messages
[Amibe] UNVReader: add dataset 2467 as valid group

According to Ideas documentation, dataset 2467 is the current group
format while datasets 2430 and 2435 are obsoletes. Also, fix a bug to
handle dataset 2430.