Add Capybara headless testing framework

Also,
* move the common dependencies between spec files to spec_helper.rb
* update authors list to be consistent with citation and website

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