Second Release Candidate

Second release candidate for Rivendell v3.x.

Please see the file 'UPGRADING' for important information.

Changes:
SQL Cleanups. Cleaned up date-time handling in SQL calls to allow
proper operation with current MySQL/MariaDB releases.

RDLibrary Reports. Fixed bugs in the 'Cart Data Dump (CSV)' report and
removed the 'Cart Data Dump (fixed width)' report.

Licensing. Changed the licensing of the Rivendell Operations Guide to
be the GNU Free Documentation License.

Python Integration. Modified the 'rivendell-pypad' RPM package to always
use Python 3.6.

Various other bugfixes. See the 'ChangeLog' for details.

Database Update:
This version of Rivendell uses database schema version 308, and will
automatically upgrade any earlier versions. To see the current schema
version prior to upgrade, see RDAdmin->SystemInfo.

Be sure to run 'rddbmgr --modify' (as root) immediately after upgrading
to allow any necessary changes to the database schema to be applied.