Refactored interfaces to use line numbers instead of hunks.
Refactored tests to use fake git diff data generated dynamically.
Updated integration test to use dynamically generated diff data
Added test for output with one line remaining (special syntax)
Fixed bug in which lines around a changed line were being included
in the diff report.
Added more integration tests using real outputs from git diff.
Updated tests to check for existing lines with a +/- sign
Incremented version number to 0.1.2
Updated test_diff_reporter to use more verbose helper function
to generate test diff data
Merge pull request #8 from edx/will/parse-hunk-changed-lines

Will/parse hunk changed lines