Bio::EnsEMBL::Test::MultiTestDB: provide DB-driver-specific subclasses.
dump_test_schema.pl & convert_test_schemas.sh
convert_test_schemas.sh: add ontology schema.
dump_test_schema.pl: add option for dumped DB type.
convert_test_schemas.sh: auto-discover databases to convert.
dump_test_schema.pl: patch SQLite primary keys.
B:E:Test::MultiTestDB::SQLite->load_txt_dump(): catch errors from sqlite3.
Merge pull request #1 from Anacode/experimental/db-portability/master

Experimental/db portability/master

Accept changes to allow for test harnesses to be built using SQLite.