[RPG-7] Added skeleton of leveling up character and adding experience.
[RPG-7] Small fix.
[RPG-7] Changed structure, added levelDown function.
Merge branch 'master' into RPG-7
[RPG-7] Added exports, added test.
Merge branch 'master' into RPG-7
[RPG-7] Integration changes
Merge branch 'master' into RPG-7
[RPG-7] Next integration with monsters.
Merge branch 'master' into RPG-7
Merge pull request #2 from Maciejfsafew/RPG-7

Rpg 7