If the upload creates a directory, the directory has the wrong permissions

[kendrickm]

The agent tries to create a file and directory with permission 0644 which is fine for files(we probably want to support uploading executable files at some point) but directories need the execute permission. This can be done by doing two io writes, one on the path with 0774, and then the file with 0644

[deviantony]

@kendrickm what about using 755 for the directory permissions instead of 774 ?