(svn r18283) -Feature: [NewGRF] Add new price bases for removing industries, building/removing unmovables (new objects), building/removing rail-waypoints/buoys, interacting with town-authority, building foundations, funding primary industries (when not prospecting) and towns.
If a GRF does not set price multipliers for these new prices, but for the previously used ones, the old modifiers will be propagated to the new bases.

(svn r17113) -Change [FS#265][FS#2094][FS#2589]: apply the subsidy when subsidy's destination is in station's catchment area and cargo packets originate from subsidy's source
-Change [FS#1134]: subsidies aren't bound to stations after awarding anymore, they still apply to town or industry, no matter what station is used for loading and unloading. Awarded subsidies from older savegames are lost
-Change [NoAI]: due to these changes, AISubsidy::GetSource and AISubsidy::GetDestination now return STATION_INVALID for awarded subsidies

(svn r16659) -Codechange: rename GetAcceptedCargo() to AddAcceptedCargo() and change its behaviour accordingly
-Codechange: remove dummy GetAcceptedCargo_*() handlers

(svn r15437) -Codechange: Do not run a code section when you already know it is useless
-Codechange: Do not rely on a decision based on something that has already been evaluated

(svn r15350) -Codechange: Create a spec array to hold the data definitions of unmovables objects.
Note that this is the very basic spec, it will be populated a bit more, later.

(svn r12157) -Codechange: Remove a structure definition and replace it with another one closely matching
-Codechange: Replace two magic numbers with according sprite names