Previously, whenever a single attribute value changed for a player, that player then sent a PlayerAttribute packet with all values for all 8 attributes.
This did not cause anywhere as much packet spam as PlayerSkill used to, but there was no good reason not to fix it as well.
Previously, whenever a single skill value changed for a player, that player then sent a PlayerSkill packet with all values for all 27 skills, plus the player's progress towards the next level and the bonuses to each attribute on the next level up as the result of sklll increases thus far.
This commit makes PlayerSkill contain only the values of specific skills, moves the player's progress towards the next level to PlayerLevel packets, and moves the bonuses to each attribute on the next level up to PlayerAttribute packets.
Players now also send a PlayerSkill packet whenever their progress towards a new point in a skill changes. This was previously avoided so as to not have massive packet spam.
Previously, charGenStage.end was doing double duty as both the variable indicating the number of CharGen stages and – when set to 0 – the variable indicating that CharGen was over. The latter role is now filled by a new boolean.
This commit changes the style of tes3mp serverside scripting mods. Short list of changes:
* Break compatibility with old server mods
* OOP style lua API
* Basic dependency checker, allowing the installation of multiple server mods without changing configs
* Remove support for C++ plugins
* Change outdated LuaBridge to [sol2](https://github.com/ThePhD/sol2);
* Support GCC, Clang and MSVC compilers
* New environment variables: "TES3MP_SERVER_DIR" and "TES3MP_SERVER_USERDIR";
* New entity "Command controller" for registering new chat commands;
* New Event system
* Simplified Timer API
* All Lua mods now run in their own environments
* Add global namespace - Data that can be used for communicating between mods
* Player and Actor inherit base class NetActor
