* Smelting Exp
Smelting now gives experience
* Furnace.txt update
Exp rewards are entered in furnace.txt, Reward calculation is now done
is the furnaceentity class
* furnace.txt update
Changed alignment tabs to spaces
Included documentation of exp in recipe
* Updated StringToFloat
changed strtod to strtof
* Explicit Float to Int
* Reworked Smelting Rewards
* No C casts
-Adds new function to the api
-Sets reward counter to 0 in furnace constructor
* Style and exp lock removed
-Fixed style mistakes accoring to PR notes
-XP isn't locked to a single player anymore
* No Smelter API
-Removed SetLastSmelter and GetLastSmelter
-Fixed comments
-Fixed log reward amounts
* Replaces AppendVPrintf with fmt::sprintf
* fmt::ArgList now used as a type safe alternative to varargs.
* Removed SIZE_T_FMT compatibility macros. fmt::sprintf is fully portable and supports %zu.
* Adds FLOG functions to log with fmt's native formatting style.
* Fixed Clang 5.0 compile errors
* Fixed wrong comment
* Only disable warnings in Clang 5 or higher
* Added a CMake condition for the Clang 5 no-zero-as-null-pointer-constant warning
* Now using the use_nullptr branch of the Cuberite specific SQLiteCpp fork
