Fix data sync

[mattstauffer]

Props sync in some places and not others. Some places pull global data via props, some manually hit the API themselves. Gotta make it consistent and vue 2.0 friendly.

[JacobBennett]

Started in #21 hopefully more to come. Might be swapping this whole freaking thing over to vuex though!

[mattstauffer]

I think a global data store, whether vuex or at least just storing everything at the top level, would be better than each component independently pulling its own data.

[phppirate]

I think Vuex is overkill in this situation. My PR #34 is using an event bus to talk to the Root component which have all the Topics and Episodes on it initially and is passing them through to the RouterView as a prop to all pages.