started new photo viewer
new photo viewer done, testing, added compressed checkbox in send-from-clipboard
mediaview start fixed for os x
merged new photoview
fixed touchscreen support in new photoview
prepared 0.5.14 version with new photoviewer
added mediaview to Qt Creator project
fixed photos overview update on new messages
Merge branch 'dev' of https://github.com/telegramdesktop/tdesktop into dev
0.5.15 version with fixes in photo viewer