Seafile-1.6.0

Changes

1. support landscape view
2. support server side thumbnail
3. change descriptional texts of subtitle to be last modified time
4. hide Activities tab and search function on community server edition
5. support cache starred files
6. support auto upload videos
7. support auto upload from custom folders
8. support Czech translations
9. optimize document provider (SAF)
   • Support writing (uploading) files
   • Support creating files/directories
   • Show starred files
   • Improve repository list: use Seafile icons for repositories, show descriptions
   • fix: don't allow user to enter encrypted repos
   • improve account (root) list: display account email address in 2nd line
   • use a thread pool for concurrent tasks
   • remove verbose FileNotFoundExceptions
   • some refactoring
   • some small fixes