- Update to version 0.9.7
* screenxlib.cpp: improved multi-monitor support for X11 based
systems
* backendxlib.cpp: fixed issues querying GTK theme colors
* window.cpp: fixed drawing issues on KDE systems
* arrows.cpp: fixed unintentional wrap-around when going below
zero value
* cursor.cpp: avoid sending two onInput signals when replacing
selected text
* semaphoreposix.cpp: use custom semaphore implementation
based on condition variable
* implemented alpha-blending for drawing bitmaps with alpha
channel