Fixed plugin installation ssl verification issue (#101)

* Added cert location debugging

* Install certifi

* Try adding manual cacert in install request

* Properly use ssl

* More efficiently load ssl certificate

backend/helpers.py

@@ -0,0 +1,7 @@
+import ssl
+import certifi
+
+ssl_ctx = ssl.create_default_context(cafile=certifi.where())
+
+def get_ssl_context():
+    return ssl_ctx