3.1.0-Leia
- Fix windows compile warnings
- Improve DX and GL parts and add support to select colors and points per line
- Add new settings to set line colors, background colors and how much frequency points are shown in a line
- Update source licence years and names
- Add licence name and source URL to addon.xml
- Add missing glm depends to debian to fix his build
- Clean FindOpenGLES.cmake description