Add the COLLATE NOCASE constraint to the name.name,
attribute.attribute_value, and typelist.tag; and remove the user of the
LOWER() function; to allow the use of indexes instead of full-table
scans. Add the COLLATE NOCASE opterator to affected queries for
backwards compatibility with Bio::DB::SeqFeature::Store databases
created without the COLLATE NOCASE constraints.
Merge pull request #66 from nathanweeks/sqlite_collate_nocase

Use COLLATE NOCASE instead of LOWER() for Bio::DB::SeqFeature::Store::DBI::SQLite