[client] Add log messages when worktree is not clean.
[client] Add more info to log for unclean worktree.
[mac] Update version to 1.4.1
Fix bug of handling file names ended with spaces.

Thoes files/folders should be ignore when checking worktree
cleaness.
[server] Fix a bug of showing deleted files when all history are kept.

Should convert commit->ctime to gint64 before comparing it with -1.
Merge branch '1.4'