Update README.md

Change package name because this one provides QT Linguist in Debian/Ubuntu
prompt a menu for users to choose whether upload a file or create a directory
add initial support for upload directory
pass QByteArray for QHttpPart::setBody because it accepts QByteArray by default
show the uploaded dir correctly after uploading
Merge pull request #345 from 1resu/patch-2

Update README.md
use "folder name"
Merge pull request #344 from haiwen/submenu_mkdir_and_upload

prompt a menu for users to choose whether upload a file or create a dire...
Merge pull request #327 from haiwen/support_upload_by_directory

[RFC] Support upload by directory
small fix of prompt messages
insert the uploaded directory into the front
Merge pull request #346 from haiwen/fix_todo_insert_item

insert the uploaded directory into the front
Update welcome-dialog.ui

Fixed grammar
Merge pull request #351 from alvonellos/patch-1

Update welcome-dialog.ui
Add new sync error string "Files are locked by other application".
update translations
WIP: support Shibboleth SSO