Fixed issue 1461 - reset password

I've tested the code in my LG G2 with android 4.2.2 and it worked.

Observations:
The code used to open the shared decks page was used to open the reset password page without change, I hope it's not confusing.

Also, I created the method ParseSharedDecks.parsePageHTML extracting code from ParseSharedDecks.doInBackground() because it seems more clear to me like this. What do you think?