Import project configurations

[callmehiphop]

Relates to #33

Users should be able to import presets for their projects. I think we'll want to allow them to do this in two different ways

1. by using a query string to specify a preset file
2. importing preset to use as a default project configurations

Option 1 would all the user to play around with a preset without making any alterations to their default project configuration. It would also be nice if they could import pre-configured plugins from the preset to their default.

Option 2 would allow setting a preset as a users default project configuration, in a way this would be similar to forking. They could import a project configuration, install additional plugins or tweak installed plugins config and then share their newly created configuration.

Just like an export button for sharing configs, perhaps we create an import button?

[callmehiphop]

For the the query string option, we should show a notification that notifies the user that they are using a preset and making any changes (adding/removing plugins) will not persist.

We might also want to include some kind of "apply" button to allow the user to make this preset their default configuration.