script user support during bootstrap

Fixes an issue where project started with the ToolkitManager wouldn't be
launched using their script user.

Author: mathurf

core/core_api.yml

@@ -14,4 +14,4 @@
 location:
   type: app_store
   name: tk-core
-  version: v0.18.99
+  version: v0.18.100