Added termcolor library to color the text we are printing, as well as
demarcate out the outputs better.

Making things CLion compatible, so changing the build directory name.

Codegen changed a bit. If it's a top level expression, we wrap it in a
function. And then all function bodies are read evaluated to Value*
using a helper.

Adapted the codegen module to one that dynamically rebinds the module to
the function, if the definition gets changed. Evaluation implemented,
but nothing tested yet.

The cloud build failed, most probably because the LLVM version from the
tutorial is not the one in the image, so upgrading.

This is the code that should work, but it's completely untested. It does
the JIT stuff and stores the output waiting to be gotten. Has linker
errors on the local runs now.

Just factoring out the code that used to be in a separate file in the
tutorial too.

Just trying it out once if it fixes the compilation.

Seeing that I am getting include errors now, hoping to get a linker
error.