Before this change, moving (renaming) a file or folder to a different name
within the same parent directory would fail, due to using the wrong API
operation ("/file/move_copy.json" and "/folder/move_copy.json", instead of the
separate "/file/rename.json" and "/folder/rename.json" that opendrive has for
this purpose.)
After this change, Move and DirMove check whether the move is within the same
parent dir. If so, "rename" is used. If not, "move_copy" is used, like before.
* Fix errcheck and golint warnings
* Remove unused constants and fix comments
* Parse error responses properly
* Fix Open with RangeOption
* Fix Move, Copy and DirMove
* Implement DirCacheFlush
* Check interfaces are correct
* Remove debugs and update overview
* Correct feature flags
* Pare replacement characters down to the minimum set
* Add to the integration tests
* Add Mkdir, Rmdir, Purge, Delete, SetModTime, Copy, Move, DirMove
* Update file size after upload
* Add Open seek
* Set private permission for new folder and uploaded file
* Add docs
* Update List function
* Fix UserSessionInfo struct
* Fix socket leaks
* Don’t close resp.Body in Open method
* Get hash when listing files
