Implement a storage using a datastore

[OrangeShark]

An alternative to both memory and file storage is to use a datastore. NeDB is one such implementation that is native to Node.js.

[marcosadp]

I implemented this on my fork on branch Issue6. You can pull it and play around with it. The reason I'm not submitting a pull request is that I had to install nvm and run a newer version of node because NeDB seems not to like node v0.6.12 (default version in Ubuntu). However, NeDB seems to be running fine on v0.10.17.

I wanted to make it your call. Do we still go on to implement this issue? Should we add some documentation on the README specifying that if using NeDB, node should be at least X version or newer?

Play with it and let me know.

[OrangeShark]

Okay, I will check it out. We will likely have to do a bit of change to the storage interface to accommodate new features and ideas. I will write up an issue to discuss it soon.

[OrangeShark]

I just recently installed Node.js on Ubuntu and having v0.6.12 as the default is really outdated... Using the latest version should be the way to go and is pretty simple to do by following install Node.js via package manager. This also installs Node.js as node if you don't have the previous conflicting package which seems like a necessity for running a lot of scripts.