Add app source, add vendoring and module support

vendor/github.com/vishvananda/netlink/.travis.yml

@@ -0,0 +1,14 @@
+language: go
+before_script:
+  # make sure we keep path in tact when we sudo
+  - sudo sed -i -e 's/^Defaults\tsecure_path.*$//' /etc/sudoers
+  # modprobe ip_gre or else the first gre device can't be deleted
+  - sudo modprobe ip_gre
+  # modprobe nf_conntrack for the conntrack testing
+  - sudo modprobe nf_conntrack
+  - sudo modprobe nf_conntrack_netlink
+  - sudo modprobe nf_conntrack_ipv4
+  - sudo modprobe nf_conntrack_ipv6
+  - sudo modprobe sch_hfsc
+install:
+  - go get github.com/vishvananda/netns