Unit tests for RQG.

Required perl modules: Test::Unit

Following environment variables are used:
RQG_MYSQL_BASE: Points to the MySQL basedir
TEST_PORTBASE: Set to a portnumber if you don't want the default ports
RQG_OTHER_GRAMMAR_DIR: Points to grammar directories outside RQG tree

Run like this:

unit/unit.pl unit/<testcase>.pm

or, to run all tests:

unit/unit.pl unit/Suite.pm
