A test for local keypair permissions
A failing test for permissions on remote node.
Fix permissions on remote node
whitespace
Merge remote-tracking branch 'origin/master' into key-permissions-382
Use a secure umask and use human notation for clarity
No need for threads here
remove double umask
Merge pull request #405 from ClusterHQ/key-permissions-382

Ensure that local and remote ssh keys have secure permissions

Author: @wallrj
Reviewer: @itamarst

 Fixes #382