-Fix: don't try to unload if there isn't anything to unload
-Add: small matrix type
-Add: implementation of SharesMap and FlowStatMap
-Codechange: Introduce save/load version naming
-Add: basic definitions and settings for link graph
-Add: basic link graph implementation
-Add: link graph job implementation
-Add: link graph schedule and typedefs for LinkGraph and related classes
-Add: demand handler for link graph
-Add: Multi-Commodity-Flow solver for link graph
-Add: flow mapper for link graph
-Codechange: save and load link graphs, jobs and the schedule
-Add: explanation of the link graph's inner workings
-Codechange: track capacities and usage of links
-Codechange: Glue between stations and flow stats
-Codechange: save and load flow stats
-Add: multimap implementation with guaranteed order between equal keys
-Feature: distribute cargo according to plan given by linkgraph
-Codechange: occasionally delete stale links and reroute cargo
-Add: abstract implementation of linkgraph overlay for GUI