CMA-ES Windows Compatibility

[Steven-Adriaensen]

Some import in the cma-es environment currently fails on windows.
Fix: Only import benchmarks that the user wants to use?

[Steven-Adriaensen]

It turns out that this failure also sometimes occurs on other OS (resource limit call fails)

[Steven-Adriaensen]

Things to try / possible solutions:

At install time:

• check whether adding resource can cause failure on windows / mac
• check whether we can store what benchmarks are installed for later use at runtime to do conditional important

At runtime, in init.py

• ideally, only import environments that are belonging to benchmarks that are installed
• alternatively, import all benchmarks, but catch import errors to produce warnings that a certain benchmark is not installed (rather than failing)