Define test-data/blastdb*.loc files
Will need a tool_data_table_conf.xml.test file for ToolShed
tool_data_table_conf.xml for TravisCI
Attempt to test RPS-BLAST and RPS-TBLASTN

This works by using test specific blastdb*.loc files, see GitHub
issue #53.

Need to add another domain database, or some more FASTA files,
in order to make a test case with some nice matches.

Note currently I am testing this by replacing the live configuration
file tool_data_table_conf.xml on my development machine - this should
be done via a test specific XML file.
Enable RPS-BLAST and RPS-TBLASTN tests under TravisCI