refactor and add more unit tests for api methods

[meltedspork]

We want to add more comprehensive unit test with api methods.

Currently we have 5 routes

• / (return listed routes)
• /name (return name of app)
• /version (return current version of app)
• /categories (return static data)
• /signs/12345 (this is fake static data)

Right now we have only one sort of valuable test in generic test/test.js and currently only tests /version. We will want to reorganize the file names to making where it makes more sense.

Note: /categories and /signs/12345 require jwt auth. but we can use proxyquire https://github.com/thlorenz/proxyquire to stub auth process so we can bypass this for testing.