Initial release

This is the initial release of Dolo.jl

Dolo is a tool to describe and solve economic models.
It provides a simple classification scheme to describe
many types of models, allows to write the models as simple
text files and compiles these files into efficient Julia
objects/functions/methods representing them.

It also provides many reference solution algorithms
to find the solution of these models under rational expectations.
Dolo understand several types of nonlinear models with occasionnally
binding constraints (with or without exogenous discrete shocks).