Move documentation to V2 of readthedocs

Author: mikaem

docs/environment.yml

@@ -5,11 +5,9 @@ channels:
   - defaults
 
 dependencies:
-  - python=3.6
   - cython
   - fftw
   - numpy
-  - nomkl
   - scipy
   - mpi4py
   - pip

readthedocs.yml

@@ -1,10 +1,12 @@
 conda:
-  file: docs/environment.yml
-
+  environment: docs/environment.yml
+version: 2
 build:
-  image: latest
-
+  image: stable
+sphinx:
+  configuration: docs/source/conf.py
+formats: all
 python:
-  version: 3.6
-  setup_py_install: true
-
+  install:
+    - method: setuptools
+      path: .