Workdir names inconsistency on fs

[smacker]

For local mode we keep the original path from the root as a path to the workdir.
For org mode the path is base64 from orgs names.

Originally it was proposed to move all local workdirs in local subdirectory and orgs in orgs.
Though we have concerns about it and it was also proposed to use base64 for consistency and to simplify the logic inside cli.

There is no final decision yet, we need to discuss it.

[se7entyse7en]

Shall we close this as dup of #173?

[smacker]

the solution might be the same but the issues are different. The fix may close both.