R1:9284c85876f0

Display property changes on files

Summary:
Never converted this TODO over from XHP.

NOTE: This looks terrible since the CSS didn't make it over, can one of you grab
the rules for .differential-property-table and .property-table-header? If they
aren't still in trunk, try history for html/intern/css/tools/differential/

Test Plan:
Made a property change, looked at it in Differentila.

Reviewed By: aran
Reviewers: jungejason, tuomaspelkonen, aran
CC: codeblock, aran
Differential Revision: 409