*: add basic test script + travis hook

Adds a simple test script, mostly to perform gofmt and govet checking;
currently tests only exist for the DHCP plugin.

.travis.yml

@@ -0,0 +1,14 @@
+language: go
+matrix:
+  include:
+    - go: 1.4
+      env: TOOLS_CMD=golang.org/x/tools/cmd
+
+install:
+ - go get ${TOOLS_CMD}/vet
+
+script:
+ - ./test
+
+notifications:
+  email: false