Added event listener for 'uncaughtException' in app.js.
Implemented amazon wish list viewing.
Merge pull request #9 from nottihub/spike

Implemented functions to remove saving books. This change helps to close #7.
Merge branch 'master' of github.com:stoshiya/bookcatalog
Implemented user database, and made a prototype of retriving amazon wish list. This change helps to close #8.
Simplified parameter validation of req.body and req.params in routes/index.js.