Update .travis.yml for Go 1.5.1

Also replaced CRLF with LF in .travis.yml

.travis.yml

@@ -1,18 +1,18 @@
-language: go
-go:
-  - 1.4.2
-  - 1.5
-  - tip
-os:
-  - linux
-  - osx
-matrix:
-  allow_failures:
-    - go: tip
-script:
-  - go test ./...
-  - go build
-  - ./hugo -s docs/
-install:
-  - go get github.com/stretchr/testify
-  - go get -v ./...
+language: go
+go:
+  - 1.4.2
+  - 1.5.1
+  - tip
+os:
+  - linux
+  - osx
+matrix:
+  allow_failures:
+    - go: tip
+script:
+  - go test ./...
+  - go build
+  - ./hugo -s docs/
+install:
+  - go get github.com/stretchr/testify
+  - go get -v ./...