Added handling of Gap attribute in make_feature_target_stash method
Added tests for loading target features in staging
Caches and stores the Gap attributes of Target features in staging table
Use zero index coordinates to store feature location of target feature
in source or subject backend
Removed the creation of temp_feature_target table
Support for loading target features in staging for Pg backend
Added the bulk loading section for all chado tables
Added unit tests for all bulk loading sections for sqlite backend
Fix the issue with generating non unique ids for features without any
id.
Added the sql statement for loading target feature locations
sql library for unit testing loading of GFF3 feature
Replace duplicate with unique feature id