Adapt sys paths

[LMZimmer]

import nasbench301 yields

Exception has occurred: ModuleNotFoundError
No module named 'surrogate_models'

due to /surrogate_models not being added via sys.path

[crwhite14]

It looks like the surrogate models folder is not currently in the pypi release.

[LMZimmer]

This should be resolved now :)

[DanielHesslow]

I had the same issue, from the github repo, seems like there are a few places where the imports only have

from surrogate_models import [...]

instead of

from nasbench301.surrogate_models  import [...]"

No biggie but you might want to fix it.

[crwhite14]

I created a pull request for this:
#4