Permission denied for example project

[mottosso]

Examples are located in the volume provided by this repo, but is mounted read-only which means that examples can't be opened nor saved.

To reproduce

$ avalon --import batman
$ avalon

Launch any example asset.

Running action: maya2015
ERROR:avalon.pipeline.Action:Could not copy application file: [Errno 13] Permission denied: 'a:\\git\\avalon-examples\\projects/batman/assets/Bruce/work/modeling/maya\\workspace.mel'

Workaround

1. Copy a:\git\avalon-examples to e.g. c:\avalon-examples
2. Set AVALON_EXAMPLES=c:\avalon-examples
3. Set AVALON_PROJECTS=c:\avalon-examples\projects
4. Launch Avalon

[tokejepsen]

Could we maybe catch or pre-test the permission error and ask the user to set a location where there is read/write permission?

[tokejepsen]

The issue is here where when root or AVALON_PROJECTS is not set then it defaults to the examples directory.

We could query for write permission here, and failing that inform the user about what went wrong and how to fix it?

[mottosso]

I expect this will be solved alongside #22 (comment) as at that point all of Avalon will reside on the local drive.

I'll push what I have so far, would be great if you were able to pick it up from there. It's got the mechanism in place and copies all dependencies, it just isn't copying the Avalon Python dependencies yet.

#53