yet another C++ framework

[albert]

I extended to be useable also as a bot framework. I ported the C++ starter bot to it.

Notable differences to the official framework:
* Game state (fleets, planet owners, ships) and game constants (planet pos, growthrate) are separated.
* Everything a bit simpler.

All code here: http://github.com/albertz/planet_wars-cpp

Note that it also includes the full game engine and the game viewer (all in C++). To make it a valid submission, delete everything except game.{h,cpp}, utils.{h,cpp} and BotCppStarterpack.cpp and rename BotCppStarterpack.cpp to MyBot.cc.