Re-indent blast.rb to use 2 spaces.

Signed-off-by: Anurag Priyam <anurag08priyam@gmail.com>
Add Blast::Query#id and Blast::Query#meta.

id   -> FASTA id
meta -> everything in FASTA def line except id

Signed-off-by: Anurag Priyam <anurag08priyam@gmail.com>
Rename Blast::Query#internal_id to Blast::Query#number, Blast::Hit#index to

Blast::Hit#number, and Blast::HSP#num to Blast::HSP#number. Thus making the
API more consistent.

Accordingly make changes to result.erb.

Signed-off-by: Anurag Priyam <anurag08priyam@gmail.com>