Travis: Force timezone to Pacific to make tests pass, for now.

This is a quick hack. The correct solution will be to fix tests so they pass regardless of user's timezone. See issue #6.

Author: dmitshur

.travis.yml

@@ -13,6 +13,7 @@ install:
   - go get golang.org/x/tools/cmd/vet
 
 script:
+  - export TZ=US/Pacific # TODO: Fix this.
   - go get -t -v ./...
   - diff -u <(echo -n) <(gofmt -d ./)
   - go tool vet ./