Merge pull request #1 from atarihomestar/master

commented out a couple tests that were not valid currently.
preparing for a merge
changed lib name to authorizenet
Merge pull request #2 from atarihomestar/master

worked more on the xml gateway method tests.
Merge branch 'master' of https://github.com/ksondere/active_merchant

Merging modified unit tests
all remote tests are passing except for the newly added refund test.
added refund test.
adding track data calls.
added some remote tests for the purchase method