Fixes, race system, autologin.

[TemirkhanN]

• Stamina consumption fix (now player spends stamina gradually and not only when he receives rewards)
• Races added. Character creation is a separate process now - after first login player will be prompt with the choices.
• Autologin on registration

Technical

• Scenes have access to the input thus it's a bit easier to read $_GET, $_POST user input,
• Boundaries between player and character replaced with the table relation. It means that player can pick different name for his character from his login name. Besides, it opens a space for multiple character possession.
• Races can be added and modified in data/race.yaml. Currently only stats are taken into consideration but I have an idea regarding segregating specialization using perks(each existing class means to have 2 perks. Like "can craft and mine but can't harvest, woodcut and etc").