Merge pull request #1324 from Keno/kf/morerefactor

Refactor Alias Elimination some more

Author: YingboMa

src/ModelingToolkit.jl

@@ -134,6 +134,7 @@ include("systems/control/controlsystem.jl")
 
 include("systems/pde/pdesystem.jl")
 
+include("systems/sparsematrixclil.jl")
 include("systems/discrete_system/discrete_system.jl")
 include("systems/validation.jl")
 include("systems/dependency_graphs.jl")