Brian/also load json events

Translation of MySQL's LONGBLOB to Vertica's LONG VARBINARY.  

It coexists with regular event output, and is controlled by
an optional parameter.  By default it runs with
event_record_type equal to 'EventRecord', but can
be overridden by running with --event-record-type 'JsonEventRecord'.

Includes bug fix to timestamp handling:  Add validation screening dates < 1900.

Also includes support for event loading to BigQuery, by adding
support for partitioning to bigquery_load.

* Use records for warehouse loading where defined.
* Check bigquery availability in load code.

Add support for loading to S3 by interval or by date.  PerDate loading
checks whether the data already exists, which is good for incremental runs.
Bulk loading just runs over an interval, and assumes the data isn't already
present on S3.  This is better for processing many days more efficiently.

To address issue with loading into BigQuery, null characters in column values
are encoded as the string '\0'.

Check Sqoop job completion before running.

Make sure enrollment output is encoded

Including a best effort translation of MySQL's LONGBLOB to Vertica's LONG VARBINARY.  Data loss is possible here.

Fix enrollment validation to use unicode version of course_id.

Add non-ASCII testing for course-id and related values to
ensure that encoding is properly done elsewhere.

Also check for the marker file when checking for completeness.

Incremental video.

Added tasks to load warehouse data into BigQuery.

Use merchant close date to compute interval.

Upgrade setuptools, and other supporting packages.

Cleaned up and added logic to figure out the latest completion date.

Default to empty function for hadoop counter callback.

Speed up finance reporting workflow.

Event Exporter Improved Encryption Logging & Error Handling 

Improving logging and adding a counter when there is a failure during the event-exporter encryption process using gpg

Workaround for travis boto issue with GCE. 

Changed active users computation to a per week basis. 

Enables contacting partner specific URLs for course information.

Added course slot number to d_program_course.

Various fixes for ProblemResponseReportWorkflow and related tasks

Remove unneeded dependence on overwrite-n-days.

Do not use --no-cache-dir for pre.txt.