Redirect from previously used routes to the current ones

[juliusknorr]

Let's hope this saves @stefan-niedermann some hassle 😉

We basically used different frontend routes in deck:

Version	Board URL	Card URL
< 1.0.0	#!/board/:id	#!/board/:id/card/:cardId
1.0.0 beta/rc	#/boards/:id	#/boards/:id/cards/:cardId
>= 1.0.0	#/board/:id	#/board/:id/card/:cardId

This PR makes sure that all previously announced route formats keep working by redirecting to the correct one.

[stefan-niedermann]

Okay, just to make sure: version 1.0.1 (the patch version update after the new major version) did introduce new routes?

[juliusknorr]

OK, sorry about the confusion, I actually mixed up that this routes:
#/boards/:id | #/boards/:id/cards/:cardId
were only part of the beta versions as #1728 was already merged before the final 1.0.0 so I'd the android app should be fine by just handling pre 1.0.0 and 1.0.0 routes as long as you keep supporting 0.8.x

[stefan-niedermann]

Ah, glad i asked 😄

Fixed in the Android app now 🙂