add new go14-style import comment

see http://golang.org/s/go14customimport

Also rename scripts directory to etc

scripts/imageproxy.conf

@@ -1,13 +0,0 @@
-# This is the upstart config I use for s.wjn.me.
-description "Image Proxy server"
-author "Will Norris <will@willnorris.com>"
-
-start on (net-device-up)
-stop on runlevel [!2345]
-
-respawn
-exec /usr/bin/imageproxy \
-    -addr localhost:8001 \
-    -log_dir /var/log/imageproxy \
-    -cacheDir /var/cache/imageproxy \
-    -whitelist willnorris.com,notsoserendipitous.com