Qt.py

------------------
* check if Shiboken2Config.cmake defines a target instead of a variable (`77 <https://github.com/ros-visualization/python_qt_binding/issues/77>`_)

------------------
* replace Qt variable in generated Makefile (`64 <https://github.com/ros-visualization/python_qt_binding/issues/64>`_)
* don't add -l prefix if it already exists (`59 <https://github.com/ros-visualization/python_qt_binding/issues/59>`_)
* if present, use the sipconfig suggested sip program (`70 <https://github.com/ros-visualization/python_qt_binding/issues/70>`_)
* replace Qt variable in generated Makefile (`64 <https://github.com/ros-visualization/python_qt_binding/issues/64>`_) (`#67 <https://github.com/ros-visualization/python_qt_binding/issues/67>`_)
* fixing trivial accidental string concatenation (`66 <https://github.com/ros-visualization/python_qt_binding/issues/66>`_)

------------------
* no warnings for unavailable PySide/Shiboken (`58 <https://github.com/ros-visualization/python_qt_binding/issues/58>`_)

* Add QtWebEngineWidgets module for Qt 5.6. This module replaces the previous
QtWebKit one.

* Import the right objects in QtGui, QtWidgets and QtCore

* Add a QtPrintSupport module


---

------------------
* check for Homebrew's PyQt5 install path (`57 <https://github.com/ros-visualization/python_qt_binding/issues/57>`_)
* port to Windows (`56 <https://github.com/ros-visualization/python_qt_binding/issues/56>`_)
* fix lint tests (`55 <https://github.com/ros-visualization/python_qt_binding/issues/55>`_)
* update sip_configure to handle improper lib names (`54 <https://github.com/ros-visualization/python_qt_binding/issues/54>`_)
* port to ROS 2 (`52 <https://github.com/ros-visualization/python_qt_binding/issues/52>`_)
* autopep8 (`51 <https://github.com/ros-visualization/python_qt_binding/issues/51>`_)
* remove :: from shiboken include path (`48 <https://github.com/ros-visualization/python_qt_binding/issues/48>`_)

------------------
* add support for additional Qt5 modules (`45 <https://github.com/ros-visualization/python_qt_binding/issues/45>`_)