Interface to Triqs

function MeshArray(objSrc::Py)

Convert a Green's function object from triqs to a MeshArray.

function from_triqs(pyobj::Py)

Convert a triqs object to a julia object. Currently support the following types:

1. Triqs Mesh (ImTime, ImFreq, MeshProduct) -> MeshGrids (ImTime, ImFreq, MeshProduct)
2. Triqs Green's function (Gf, GfImTime, GfImFreq) -> MeshArray
3. Triqs BlockGf -> Dict{String, MeshArray}