merge progress made by @diorcety

[jaromil]

Big up to @diorcety for the recent progress made on FreeJ, seems pretty good to me.
https://github.com/diorcety/FreeJ
You are welcome to file a pull request when you think it is time for it.

[diorcety]

Wait wait, it's a WIP :D
I'm trying to improve the behaviour of FreeJ against Swig.
Indeed some object are shared between internal FreeJ structure and python for example. it can produce segfault following if the internal code delete the object. (double free for example)
For that i'm trying to use more std, split javascript/no_javascript code, cleanup, and at the end use shared_ptr to avoid the issue.
Can be a bit long :)

[jaromil]

ack. yes the issue there was exactly what you point at. I never rly used python so the swig was a basic proof of concept for one-run scripts.

happy hacking, i'll be following.