Initial PR for verified cert reporting

Refactored from code in Stanford's itemized revenue reports into a new Report class used for all revenue-related reporting.

Models for all cert types complete; test coverage for half of cert types complete.

If this architecture is deemed solid, the next steps are to add a reasonable UI folks will use to select reports to download, allow them to restrict based on dates/universities, and of course complete test coverage.
Fixed CertificateStatusReportModel
Fixed UniversityRevenueShare model
Refactored tests
Migrations
Initial view
Response to CR
Template changes
Response to CR
More response to CR
Added myself to the Authors list
Merge branch 'master' of git://github.com/edx/edx-platform into feature/mattdrayer/authors-addition
Course Start Date Changes

Doc updated for STUD-1132
Added doc for file sorting change

For STUD-1038
Updated change log

for STUD-1038
Section and Subsection release dates change

Changed to reflect default change for new sections/subsections
CR response
Response to CR 1-13
Add unit tests for non-ASCII forum content
Encode periods and $ in block_id map
STUD-872