create requirements.txt

If I am right, I can now use mybinder.
2019-03-15 19:58:13 +01:00 · 2019-03-15 19:58:13 +01:00 · a8481f6aae
parent 540e802eaa
commit a8481f6aae
1 changed files with 1 additions and 0 deletions
--- a/requirements.txt
+++ b/requirements.txt
@ -0,0 +1 @@
+astropy