migrate docs to rtd

Author: Bultako

.readthedocs.yaml

@@ -0,0 +1,22 @@
+# .readthedocs.yml
+# Read the Docs configuration file
+# See https://docs.readthedocs.io/en/stable/config-file/v2.html for details
+
+# Required
+version: 2
+
+# Build documentation in the docs/ directory with Sphinx
+sphinx:
+  configuration: docs/conf.py
+
+
+# Optionally build your docs in additional formats such as PDF and ePub
+#formats: all
+
+# Optionally set the version of Python and requirements required to build your docs
+python:
+  version: 3.7
+  install:
+    - requirements: docs/requirements.txt
+    - method: pip
+      path: .

docs/requirements.txt

@@ -0,0 +1,12 @@
+sphinx
+nbsphinx
+numpydoc
+sphinx-automodapi
+sphinx_rtd_theme
+ipython
+matplotlib
+scipy
+astropy
+numpy
+pandas
+nfft