v0.12.2

ImageView v0.12.2

Diff since v0.12.1

Merged pull requests:

• add shortcuts for closing and fullscreening window (#302) (@jwahlstrand)
• add save to file and copy to clipboard to context menu (#303) (@jwahlstrand)

Closed issues:

• Wrong window size information (#165)
• Update pixel value while changing image with keys (#218)
• ImageView grinds Windows to a hold (#287)
• Crash on second or third call to imshow() (#290)
• ImageView doesn't display data if plotting with PyPlot occurs first (#295)
• Minimizing window created with ImageView imshow crashes Julia (#301)