Added support for background loading of the application to speed up initial requests in dev mode.
Removed leftover from the module system.
Fix syntax error on py3
Added EXPLAIN_TEMPLATE_LOADING to help people debug templates not being loaded.
Fixed a relative import
Fix Py3 compat bug

Also don't use unicode string here because the assertions below are
written for native strings.
assert_ is assert_true
Remove run-simple.py
Move tests
Made tests recognizable
Tests pass now.
Remove testsuite package from setup.py
Update tox
Metadata change
Some fixes
Don't test old Werkzeug against py3
Rework test_config
Move fixtures
Rework test_signals
Rewrite assertion methods