-Codechange: Introduce save/load version naming
-Add: small matrix type
-Add: implementation of SharesMap and FlowStatMap
-Codechange: basic link graph
-Codechange: track capacity, supply, usage in link graphs
-Add: demand calculation for linkgraph

Conflicts:

	src/linkgraph/linkgraph.cpp
	src/linkgraph/linkgraph.h
	src/saveload/linkgraph_sl.cpp
-Add: MCF solver for linkgraph