VueSource v1.1

Additions:

• added Rollup compilation, so should now work in all webpack builds
• can inspect() components in Vue DevTools v4 via the console $0.inspect()

Changes:

• uses Vue.use() rather than VueSource.init()
• minor changes to type parameter
• access Vue component in console via $0.vm rather than $0.vue (to keep inline with DevTools)