use a uniform naming convention for sql library files
added Test::Roo as dependency
added sql library for loading GFF3 to postgresql backend
Added a Test::Roo based reusable Role for unit testing both sqlite and
pg backends.
Added GFF3 loader module for postgresql backend
uniform naming of loader module
Added done_testing at the end when running without a plan
Added two more testing roles for refactoring testing with sqlite chado
backend.
Chadogff3 mostly has the part to run the setup and teardown
TestChadoGFF3 has most of the test.
Added unit tests for chado pg backend