-Codechange: Introduce save/load version naming
-Add: basic definitions for link graph
-Add: implementation of SharesMap and FlowStatMap
-Add: settings for link graph
-Codechange: Glue between stations and flow stats
-Add: support for flow stats to linkgraph overlay

Conflicts:

	projects/openttd_vs100.vcxproj
	projects/openttd_vs100.vcxproj.filters
	projects/openttd_vs80.vcproj
	projects/openttd_vs90.vcproj
	source.list
-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 graph jobs and the schedule
-Add: explanation of the link graph's inner workings
-Codechange: schedule jobs when tracking capacities of links
-Codechange: save and load flow stats
-Add: multimap implementation with guaranteed order between equal keys
-Feature: distribute cargo according to plan given by linkgraph
-Feature: consider cargo waiting at other stations for rating at the origin station
-Add: function for deterministic approximate division
-Feature: show cargo by next hops and final destinations in the station GUI