Vendor the external cookbooks

Knife-Zero doesn't include Berkshelf support, so vendoring everything in
the repo is convenient again

cookbooks/apt/files/15update-stamp

@@ -0,0 +1 @@
+APT::Update::Post-Invoke-Success {"touch /var/lib/apt/periodic/update-success-stamp 2>/dev/null || true";};

cookbooks/apt/files/apt-proxy-v2.conf

@@ -0,0 +1,50 @@
+[DEFAULT]
+;; All times are in seconds, but you can add a suffix
+;; for minutes(m), hours(h) or days(d)
+
+;; commented out address so apt-proxy will listen on all IPs
+;; address = 127.0.0.1
+port = 9999
+cache_dir = /var/cache/apt-proxy
+
+;; Control files (Packages/Sources/Contents) refresh rate
+min_refresh_delay = 1s
+complete_clientless_downloads = 1
+
+;; Debugging settings.
+debug = all:4 db:0
+
+time = 30
+passive_ftp = on
+
+;;--------------------------------------------------------------
+;; Cache housekeeping
+
+cleanup_freq = 1d
+max_age = 120d
+max_versions = 3
+
+;;---------------------------------------------------------------
+;; Backend servers
+;;
+;; Place each server in its own [section]
+
+[ubuntu]
+; Ubuntu archive
+backends =
+        http://us.archive.ubuntu.com/ubuntu
+
+[ubuntu-security]
+; Ubuntu security updates
+backends = http://security.ubuntu.com/ubuntu
+
+[debian]
+;; Backend servers, in order of preference
+backends =
+        http://debian.osuosl.org/debian/
+
+[security]
+;; Debian security archive
+backends =
+        http://security.debian.org/debian-security
+        http://ftp2.de.debian.org/debian-security