Improve management of game data.

[ineveraskedforthis]

• Most of the data is moved to c++ dll based on DataContainer (dcon).
• Add build scripts to build dll/so files and pull updates from dcon repository.
• Add code generation scripts to manage remaining lua-managed data and wrap calls to dcon into properly typed functions.
• Drastic speed up of saving and loading: using luajit string buffers and memory mapping instead of bitser.
• Speed up of update ticks: some expensive functions were moved to shared library
• Global rewrite to accommodate for new way to manage data with c++
• Economy update is streamlined.
• DBM cultural weights are now calculated with iterative process instead of heuristic based on payouts.
• Add --nopreload launch tag to prevent preloading of all mapmodes on game start: map modes switching is way faster now and the whole preloading thing is probably not needed anymore.