Changes for Release 1.9.7

Changes for Release 1.9.6

Merge pull request AuthorizeNet#157 from kikmak42/master

Update version and client id to 1.9.5

Merge pull request AuthorizeNet#135 from AuthorizeNet/future

Merging Future into master

Merge pull request AuthorizeNet#112 from iamvery/patch-1

Fix sandbox link in readme

Update constants.yml

Merge pull request AuthorizeNet#98 from AuthorizeNet/future

merging future branch for new release.

Update constants.yml

Update .travis.yml

Update .travis.yml