Move some aprhont/ stuff around a little bit
Summary:
"configuration/default" moved to "default". Rename it to "configuration" and put config stuff back there.
Put writeguard into writeguard/.
Test Plan: tools
Reviewers: vrana
Reviewed By: vrana
CC: aran
Maniphest Tasks: T1103
Differential Revision: https://secure.phabricator.com/D2639