Add check for file permissions on ~/.nipaprc

[job]

Ensure users don't leave easily readable .nipaprc file around

[plajjan]

Nice!
This should really go in "nipap" and not the module itself, I see that you only put this code where the current code for reading the configuration file is, but that should be moved... I'll look into that. Rebase impending ;)

[plajjan]

I think we should mimic SSH;

Permissions 0777 for '.ssh/id_rsa' are too open.
It is recommended that your private key files are NOT accessible by others.
This private key will be ignored.

Ie, drop the "Command failed" (anyone should get that much) and print "Permissions XXX for ~/.nipaprc are too open". I think this should be printed to stderr too. You should probably use string formatting for the path to the configuration file.

[plajjan]

Merged through CLI. Closing.