[httpserver] Remove default_max_upload_file_size
Add fuse support.

 * Now we just support read-only mode in seaf-fuse.
[server] Fix bugs in seaf-fuse.
fixed a typo in setup-seafile-mysql.py
fixed a typo again
[server] Improve FUSE output layout.

The new layout looks like
/
-- user1
  -- library 1
  -- library 2
-- user2
  -- library 3
[server] Fix memory leaks in seaf-fuse.
[server] Don't list virtual repos in seaf-fuse.
[win] update build scripts
[server, python] Add is_virtual field to SharedRepo object.
[server] Add system default library.

Used as template for creating default libraries for users.
[server] Change 'system default library' to 'My library template'.
[client] add rpc check_path_for_clone
[server] Fix SQL syntax error for MySQL.
[server] Fix SQL syntax errors for Postgresql.
[server] Populate library template from seafile-data/library-template.
Add tutorial files.
update source to 2.0.7; update msi/deb version to 2.1.0
add seafdav to controller/scripts
[scripts] add server 2.1.0 upgrade scripts