Shortcuts to jump between related files

Shortcuts to jump between related files (for example a component template and the js file) would be pretty helpful in a lot of situations. Also I guess it would make implementing #29 a lot easier since no matter what files is opened after generation, you can quickly jump to the file you want with a shortcut.

For blueprints with more than two items (e.g. component template, js and integration test) I guess there should be a shortcut to cycle through the different files and also a shortcut to list all related files as quick pick items, so the user can select the one he wants to open.