QL-Win#627: a new app icon 🎉

Update .appveyor.yml

Update GitHub API key

Merge branch 'master' of github.com:QL-Win/QuickLook

update SharpCompress lib

Merge pull request QL-Win#350 from rabelux/UpdateREADME

Updated readme

Fix QL-Win#337: Exif rotation is broken in WPF

minor

copy buffer before showing

fix possible crash (?) due to DateTime format

fix crash