Install XML::Parser in Travis, it's used by t/05bgep-re.t
Test Parser::DBI::PostgreSQL in Travis
Set all the env variables in one "env" entry
Switch t/13schema.t to done_testing
Test Schema::Table->is_trivial_link and ->is_data
Install Graph::Directed and GD to test Producer::Diagram
Output the build log on cpanm failure
Install the libgd development package
Ignore Devel::Cover output
Use a schema with FKs for diagram testing
Fix and extend link table tests
Add 'use warnings', test case-insensitive ->get_field
Extend Field->equals() for numeric comparison
Add more data_types for sql_types mapping
Switch to @haarg's perl-travis-helper, add 5.20 and blead
Use my fork of the helpers, for debugging
Die instead of warning if roundtrip regen fails

This lets the Travis helpers' auto-prereq-installation work.
Actually install Devel::Cover
Propagate switches when running perl in tests
fix Producer::SQLite::batch_alter_table rename field