Merge branches 'clean-code' and 'readme'
Reprise du jeu de la vie de Conway
tab_2d_char_essential : Adding a function for swaping and an other one for replacing value
Adding some essential action functions of Halma game
Finishing marking moving possibilities and use of this for the next command.
Adding functions to count marks and use of 1 in next turn context.
Conway's Game of Life is over, long life to Halma game.
Fixing documentation generation
Adding position_2d_uint and position_2d_uint_pair that can be usefull respectively for a position on a grid and a move.
Update of README
Minor changes
Adding struct for Halma game player with functions, but without a C file and a rule in makefile :(
Finishing struct player
Managing players of a Halma game
Minor changes
Improving help command
Adding functions for checking if a string is a number
Easier and safer user inputs
Optimizing string_functions.c
Improving error messages for wrong user inputs