`dialog` compatible with current API draft
don't reset file if it wasn't changed in dialog
refactor dialog tabs
preview tab almost shows preview
show preview after choose file without dialog
fix RemoteTab
open dialog on click on file name
`File` provides `previewUrl`
preview tab states
minor fixes in dialog
remove unused code
fix exports and export uploadcare.Circle
uploadcare.expose
add some templates
Dialog::'s addTab() and switchTab() are public
__switchTab, __addTab -> switchTab, addTab
merge with master
throw real Errors
Merge pull request #32 from uploadcare/dialog

Preview Dialog Tab