Refactored Autograder

[geshuming]

Changes:

• Changed from Output[] to Summary output format
• Refactored for new XML format

Todo:

• Rewrite tests to only test autograder and not library files

[coveralls]

Pull Request Test Coverage Report for Build 200

• 22 of 22 (100.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+62.6%) to 97.802%

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Totals
Change from base Build 156:	62.6%
Covered Lines:	54
Relevant Lines:	54

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💛 - Coveralls

[geshuming]

This pull request was badly done. There is a reworked one at #69