main.cpp rework * Move ClientLauncher class to a dedicated file * ClientLauncher now owns print_video_modes and speed_tests functions (they are only called by him) * Move GameParams to shared/gameparams.h because it's shared between server and client and launcher need to know it * Move InputHandlers class to client/inputhandler.h * Cleanup includes

Switch the license to be LGPLv2/later, with small parts still remaining as GPLv2/later, by agreement of major contributors

configwriting/saving isn't complete and will break your config if you use fancy keys

configwriting/saving isn't complete and will break your config if you use fancy keys

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rename : src/licensecomment.txt => licensecomment.txt