1.7.0: Automatic test module detection

<test_package>.tests.__init__ now autodetects test modules, so manual importing is no longer required.

Details

• Template __init__.py file now detects and imports submodules automagically (based on this blog post. No need to import new tests every time a new one is added
• test_loader ignores <test_package>.tests.pkgutil if present while loading test modules.