PythonQt Code

reimplemented argument frame caching (previous approach was not thread-safe when GIL is used)

compile thread support by default
added PythonQt::setEnableThreadSupport() to enable the thread support (disabled by default)
added PythonQtSafeObjectPtr to allow safe GIL-aware storage in QVariant

switched to using macros for scopes

initial GIL support (needs to be enabled via defines)

reverted usage of _PyImport_FixupBuiltin

added support for attribute lookup error callback

make sure that Python.h is always included first
added new PY3K loader
removed buggy __pycache__ caching

fixed ref counting of types
ignore eggs in importer

added getNativeVariable

fixed unicode code and filename support for Python 3