Add license note in README

README.md

@@ -6,11 +6,11 @@
 ## Considerations
 If you have a system-wide shortcut assigned to the`Print`
  key, you should disable it because it may interfere with the global key detection.
- 
+
  In order to solve this problem I'm thinking about creating a cli tool to communicate with Flameshot via IPC socket; you could assign the specific command tto trigger the capture in a very convenient way. (that could be extended with many functions but it isn't a priority)
- 
+
  Check the ./docs folder for more information.
- 
+
 ## Dependencies
 - QT (tested with QT5.8)
 - QT X11
@@ -30,3 +30,4 @@ Choose your buttons and edit your screenshots!
 - The button icons are licensed under Apache License 2.0. See: https://github.com/google/material-design-icons
 - The code at capture/capturewidget.cpp is based on https://github.com/ckaiser/Lightscreen/blob/master/dialogs/areadialog.cpp
 - The code at capture/capturewidget.h is based on https://github.com/ckaiser/Lightscreen/blob/master/dialogs/areadialog.h
+- Qt-Color-Widgets taken and modified from https://github.com/mbasaglia/Qt-Color-Widgets (see their license and exceptions in the project)