Validate filepath
Fixed: NameErro, name Status is not defined; validate upload file path, https://github.com/LiuLang/bcloud/issues/70
Remove deprecated icons
Add CzBiX to author list
Fixed: NameError: name 'abspath' is not defined in NewFolderDialog
Add popup menu to DownloadPage
add share_transfer api for pcs
add verify_share_password api for pcs