Issue #85: Fix importing hooks to load them again from files like hook-package.subpackage.modname.py.
Issue #85: Fix spec for test basic/test_pkg_structures.
Merge branch 'modulegraph' of github.com:matysek/pyinstaller into modulegraph
Issue #85: Implement looking for hooks in custom location.
Issue 85: Remove old hooks that are properly handled by modulegraph library.
Issue #85: Move some hooks back to file structure. Remove old hook hook-dns.py.
Issue #85: Move of some other hooks back to onefile structure. Readd hook hook-dns.py.
Issue #85: 3rd move of hooks back to onefile structure.
Issue #85: Fix handling multiple locations of custom hooks.
Issue #85: Put PyQt5 hooks to old file structure.