EDEN-703: Error in pre-commit hook.
Adding support for Unicode in ben10

BEN-41
No longer building xdist during job
Creating the command tf fix-encoding.
Cleaning the code: unused-imports, unused-pass, fix-format.

Using autoflake to remove unused-imports/unused-pass:

  autoflake --remove-all-unused-imports -i XXX

Protecting some imports from the tool using a comment (any comment will do, but I'm using # @UnusedImports.
EDEN-707: pyftpdlib-1.4.
Added method to convert Unicode to byte string
Unicode: Making uname functions really return unicode.
Removing filesystem duplicate symbols.
Properly incorporating FindFiles and friends into ben10.filesystem
Fixes on terra_former regarding identifying changes on import.
Support to multiple filenames for add-import-symbol command.
FIX: tf fix-format only prints handled filenames.