Release notes

• Adding text detection capabilities by implementing the Stroke Width Transform algorithm #125
• Avoid leaked goroutines when the GUI mode is activated #108
• Rotate the masks together with the image when both dimensions change #117
• Align the GUI window to the center of the screen
• Keep image underlying transparency when the image is resized #114
• Fixed seam misplacement on GUI window #125
• Fixed Sobel operator edge detection correctness #113
• Fixed performance regression when debugging mode is enabled in GUI
• Fixed missing temporary directory on Windows when the source image is downloaded from internet #122
• Upgrade Gio to v0.10.3
• Code restructuring
• Better test coverage