use opencv-python module on linux

docs/install.md

@@ -17,7 +17,7 @@ Run app using ``toxygen`` command.
 2. Install PortAudio: 
 ``sudo apt-get install portaudio19-dev``
 3. For 32-bit Linux install PyQt5: ``sudo apt-get install python3-pyqt5``
-4. Install [OpenCV](http://docs.opencv.org/trunk/d7/d9f/tutorial_linux_install.html) or via ``sudo apt-get install python3-opencv``
+4. Install [OpenCV](http://docs.opencv.org/trunk/d7/d9f/tutorial_linux_install.html) or via ``sudo pip3 install opencv-python``
 5. Install toxygen: 
 ``sudo pip3 install toxygen``
 6. Run toxygen using ``toxygen`` command.
@@ -63,7 +63,7 @@ Optional: install toxygen using setup.py: ``python setup.py install``
 4. Install PyAudio: 
 ``sudo apt-get install portaudio19-dev`` and ``sudo apt-get install python3-pyaudio`` (or ``sudo pip3 install pyaudio``)
 5. Install NumPy: ``sudo pip3 install numpy``
-6. Install [OpenCV](http://docs.opencv.org/trunk/d7/d9f/tutorial_linux_install.html) or via ``sudo apt-get install python3-opencv``
+6. Install [OpenCV](http://docs.opencv.org/trunk/d7/d9f/tutorial_linux_install.html) or via ``sudo pip3 install opencv-python``
 7. [Download toxygen](https://github.com/toxygen-project/toxygen/archive/master.zip)
 8. Unpack archive
 9. Run app:

docs/plugins.md

@@ -1,6 +1,6 @@
 # Plugins
 
-Toxygen is the first [Tox](https://tox.chat/) client with plugins support. Plugin is Python 3.4 - 3.6 module (.py file) and directory with plugin's data which provide some additional functionality. 
+Toxygen is the first [Tox](https://tox.chat/) client with plugins support. Plugin is Python 3.5 - 3.6 module (.py file) and directory with plugin's data which provide some additional functionality.
 
 # How to write plugin
 

setup.py

@@ -25,6 +25,10 @@ else:
         import numpy
     except ImportError:
         MODULES.append('numpy')
+    try:
+        import cv2
+    except ImportError:
+        MODULES.append('opencv-python')
 
 
 class InstallScript(install):