Create AMUSE Anaconda packages

[rieder]

Is your feature request related to a problem? Please describe.
Lots of Astrophysicists use Anaconda for their Python needs. Offering AMUSE as Anaconda packages would therefore be practical.

Describe alternatives you've considered
Just offering pip packages works, but Anaconda adds the benefit of managing prerequisites as well, which will also make it easier to offer binary packages

Additional context
Analogue to #294

[rieder]

I have no experience with Anaconda, so help with this would be welcome!

[rieder]

Here's a similar issue for Healpy which may come in handy: healpy/healpy#251

[ipelupessy]

travis for mac uses conda (I think @egpbos looked into this...)

[rieder]

good, that might help.

[egpbos]

I built a few conda packages. Be sure to check out conda-forge, it will almost certainly be best to put the package(s) there. I'd be happy to help a bit. The basics are pretty well documented I think (clone the staged_recipes repo, make your own branch and build write the recipe), so that should get you off to a good start.

[rieder]

We should pick this up again. AMUSE and conda is still a recipe for disaster...

[LourensVeen]

I've been working on this over the past weeks, and have so far failed to make it work. The current build system seemingly isn't set up for building packages or for compiling community codes separately from the framework, and while I've found a framework_build option that seems to try to do something is this direction, it isn't used by the PyPI packages and I run into problems when I try to build using it. I also run into a great variety of problems when I try to build without it.

Since the build system needs to be replaced anyway because the setuptools mechanism it's based on is obsolete and has been removed, I'm going to do that first, and then try again with the new build system, which will of course be designed to work better for building separate packages as well. See #1024.