[stable/zed] Transition to Tox (#1642)

diff --git a/.gitignore b/.gitignore
index 6993ca3..48724ea 100644
--- a/.gitignore
+++ b/.gitignore
@@ -20,3 +20,5 @@
 .stestr
 .tox
 doc/build
+collections/
+*.egg-info