Update my entry in the GitIntro test.
Merge pull request #16 from gbtitus/add-to-GitIntro

Update my entry in the GitIntro test.
This test failed because the type data_set was really an empty struct.
I looked at the test and the type in question was not actually
important to its functionality, so the test has now been simplified
and the type removed.
Merge remote-tracking branch 'chapel-lang/master'