Update README.md

README.md

-WORK IN PROGRESS
+# WORK IN PROGRESS
+
+## Installation 
+
+### Adding packages 
+```
+using Pkg
+Pkg.add(PackageSpec(url="https://git.dynare.org/julia-packages/fastlapackinterface.jl.git"))
+Pkg.add(PackageSpec(url="https://git.dynare.org/julia-packages/polynomialmatrixequations.jl.git"))
+Pkg.add(PackageSpec(url="https://git.dynare.org/julia-packages/linearrationalexpectations.jl.git"))
+Pkg.add(PackageSpec(url="https://git.dynare.org/julia-packages/dynare.jl.git"))
+```
+or, interactively,
+```
+]add https://git.dynare.org/julia-packages/fastlapackinterface.jl.git
+]add https://git.dynare.org/julia-packages/polynomialmatrixequations.jl.git
+]add https://git.dynare.org/julia-packages/linearrationalexpectations.jl.git
+]add https://git.dynare.org/julia-packages/dynare.jl.git
+```
 
 Until a proper ``build.jl`` is added, one must confiure DYNARE_ROOT in ``./src/parser/DynarePreporcessor.jl`` to point to the installation of a current unstable version of Dynare or Dynare preprocessor