Added httr.outh to vig

Author: avinashkz

Diff for: .travis.yml

@@ -6,5 +6,6 @@ before_install:
 - openssl aes-256-cbc -K $encrypted_d1234_key -iv $encrypted_d1234_iv -in tests/testthat/secrets.tar.enc -out tests/testthat/secrets.tar -d
 - tar xvf tests/testthat/secrets.tar
 - mv tests/testthat/.Renviron .Renviron
+- cp tests/testthat/.httr-oauth vignettes/.httr-oauth
 - cat .Renviron