rename tables course_enrollment_* -> course_enrollment_*_daily
Merge pull request #28 from edx/jbau/append-daily-to-tables

rename tables course_enrollment_* -> course_enrollment_*_daily
updating to match exporter
Merge pull request #29 from edx/e0d/fix-ok-sha

updating to match exporter
Add support for multiple event patterns.
Support validation of enrollment.

* Synthesize validation events from Sqoop dumps of
  student_courseenrollment.

* Compare validation events with enroll/unenroll events.
  Includes unit tests.