README udpate

Author: rknop

README.md

@@ -1,15 +1,4 @@
 # FASTDB
 Development of the Fast Access to Survey Transients Database (FASTDB).
 
-TODO: get this set up on readthedocs
-
-In the mean time, to read the documentation, check out this git archive.  Make sure you have [Sphinx](https://www.sphinx-doc.org/en/master/index.html) installed on your system.  cd into the `docs` subdirectory of your checkout and run
-```
-make html
-```
-
-Then, point your web browser at:
-```
-file:///path/to/checkout/docs/_build/html/index.html
-```
-replacing `/path/to/checkout` with the absolute path of your git checkout.
+Documentation is on readthedocs : https://fastdb.readthedocs.io