Batcave

- Added
- Added VisualStudioWebsite and VisualStudioWebapp.

- Changed
- Improve product and builder argument handling.
- Added leader to build messages.
- Change Docker tag to be just the buildname.

- Removed
-Removed vsver argument to Visual Studio products and builders.

- Added
- Added create_package argument to CxFreezeBuilder.

- Changed
- Don't require packages which aren't available in Docker Alpine containers.
- Don't install PyQt5 on unsupported Linux distributions.
- Improve Linux build OS determination in platarch.get_type.

- Changed
- Make sure all __getattr__ calls raise AttributeError on failure.

- Added
- Added VisualStudioWebapp product type.
- Added hasapp option to VisualStudioWebsite product type.

- Changed
- Update setuptools to 38.2.3.

- Changed
- Update setuptools to 38.2.1.
- Update PyQt5 to 5.9.2.

- Changed
- Updated multi-server build config file handling.
- Update setuptools to 37.0.0.
- Update virtualwrapper-win to 1.2.4.
- Update PyQt5 to 5.9.1 on Linux.