Write Tests

[mubaris]

Both browser and javascript testing will be helpful.

[alejandronanez]

I think for this to work fine we first need to:

1. Move all the project to use modules Modules #17
2. Maybe pickup a JS framework as we talked here Building a backend #20 so we will know what test strategy to follow

[mubaris]

@alejandronanez I will be working on #17. I will merge the commits by tomorrow or day after that. More discussion about backend at #20. Then we take up this issue.

[raulvillares]

For JS unit testing I've found this article interesting:

https://medium.com/javascript-scene/why-i-use-tape-instead-of-mocha-so-should-you-6aa105d8eaf4

[devcer]

I would like to work on this. Can you assign this to me?