Feature Request - Cluster Support

[PatrickWalker]

I would like to run a cluster of private-bower servers either in master-master or master-slave

Currently I think that's difficult with the file storage and the fact most operations are done in memory

Would like to offer the ability to use different storage types (SSDB example) via an adapter.

Would this be of any interest? I did a very hacky job in my fork to get it working but that effectively just replaced the file storage with SSDB rather than offering it to be configurable