Add rudimentary tests

src/MetagraphOptimization.jl

@@ -0,0 +1,26 @@
+module MetagraphOptimization
+import Base.show
+import Base.==
+import Base.in
+
+include("tasks.jl")
+include("nodes.jl")
+include("graph.jl")
+include("task_functions.jl")
+include("node_functions.jl")
+include("graph_functions.jl")
+include("graph_operations.jl")
+include("import.jl")
+include("utility.jl")
+
+export Node, Edge, ComputeTaskNode, DataTaskNode, DAG
+export AbstractTask, AbstractComputeTask, AbstractDataTask, DataTask, ComputeTaskP, ComputeTaskS1, ComputeTaskS2, ComputeTaskV, ComputeTaskU, ComputeTaskSum, FusedComputeTask
+export make_node, make_edge, insert_node, insert_edge, is_entry_node, is_exit_node, parents, children, compute, graph_properties, get_exit_node, is_valid
+export node_fusion, node_reduction, node_split, generate_options
+export import_txt
+
+export ==, in, show
+
+export bytes_to_human_readable
+
+end # module MetagraphOptimization