Add a headless unit test doing a simple BLAST search.

The basic framework is set with a simple test which performs a BLAST
query with SequenceServer.

Signed-off-by: Vivek Rai <vivekraiiitkgp@gmail.com>
Update bin/sequenceserver banner text

Signed-off-by: Vivek Rai <vivekraiiitkgp@gmail.com>