Add rake task to update dependencies and/or language versions.

[jweakley]

The task should do the following:

• Create new branch
• Detect if env uses rvm or rbenv and updates ruby, if requested.
• Use nvm to update node/iojs, if requested.
• Update all Wildland standard dependencies (see Add a list of Wildland standard dependencies #14), if requested.

[jweakley]

We should shard off the rake tasks into a separate dev tooling gem. We should look to see which of our dev gems can also be folded into this new tooling gem (pry is one that comes to mind).

The goal of this gem would be to have an easy way of updating/tracking all of our dev tools. Right now if we improved our reports rake task, the only way to get the new one is to manually override it. We should be able to automate this to help prevent mistakes and make it easier to move between projects.

[jweakley]

The gem should also add a rake task for updating local dev dependencies (instead of a bunch of steps).