Grand test fixup (#138)

* start fixing up tests

* fix up tests + automate with drone

* fiddle with linting

* messing about with drone.yml

* some more fiddling

* hmmm

* add cache

* add vendor directory

* verbose

* ci updates

* update some little things

* update sig

vendor/github.com/microcosm-cc/bluemonday/.travis.yml

@@ -0,0 +1,26 @@
+language: go
+go:
+  - 1.2.x
+  - 1.3.x
+  - 1.4.x
+  - 1.5.x
+  - 1.6.x
+  - 1.7.x
+  - 1.8.x
+  - 1.9.x
+  - 1.10.x
+  - 1.11.x
+  - 1.12.x
+  - 1.13.x
+  - 1.14.x
+  - 1.15.x
+  - 1.16.x
+  - tip
+matrix:
+  allow_failures:
+    - go: tip
+  fast_finish: true
+install:
+  - go get .
+script:
+  - go test -v ./...