Analysis

[Dandigit]

Related issue: #34

Changes made
Adds support for semantic analysis and typechecking. Required to pick up invalid code like this:

var foo = 21
var boo = "yo!"

foo + boo // Error!

const oof = 30
oof = 21 // Error!

var foo = 40 // Error!

I've also added a few tests in the tests directory.

[Dandigit]

Forget it. I'll fix Travis another day.