Implemented the ImportEvents command line tool, which allows event
definitions to be imported. In all cases the tool will try to import all
definitions; if an error occurs, the process continues but the
transaction is rolled back. It skips existing definitions rather than
taking the risk of doing something inappropriate (e.g. deletion of
existing events).
* Added "dummy" data file for technologies (for now it simply copies the
old, line-based technologies) and corresponding XML schema
* Added missing SQL stored procedure to clear all dependencies and
reverse dependencies from a technology
* Added import classes, loader and import tool for the technology graph
* Added tech graph import tool to post-build tests
* Added a system that allows "dirty" tests to be written. These tests
actually need to change the database, so a temporary test database must
be created to run them.
* Added in-base logging through a foreign data wrapper, which is only
possible using PostgreSQL 9.1
* Renamed database-related configuration files to indicate that they are
samples, and added the "real" names to the Git ignore list. Server
distribution modified accordingly.
* Removed PL/PgSQL registration (it was only necessary on 8.4)
* Added pgTAP SQL definitions and a script which will (hopefully) be
executed by the build system after the main Java build in order to
execute database unit tests. The script supports both admin- and user-
level testing. I also added a few tests to make sure the testing framework
actually runs them.
* Added documentation about the database definitions structure
