Support for Unicode pathnames and user-mount convenience

[GoodGuysFree]

Hi,

I'd like to suggest these 2 commits, to support unicode pathnames, and to help with fstab installs, by letting a non-root user mount an fstab-configured Google Drive filesystem.

Hope you'll consider these.

Thanks,

[je-vv]

For the newest release 0.14.8 your commit for ut8 requires changes.

The new patch just keeps the normal_entry.py modifications, given the opened_file.py ones are no longer required, neither match the current code:

https://github.com/dsoprea/GDriveFS/files/367583/pull_154_utf8.txt

[GoodGuysFree]

I agree that the first part of d6d8055 (gdrivefs/gdfs/opened_file.py) is no longer needed. I am not sure about gdtool, but generally, encoding to ASCII can be problematic at times.

I feel this commit can be omitted completely.

Commit de2ce14 however, I feel is still useful.