Migration to PT5 client (v1)

[d3v1l401]

Modified everything that has changed in PT5 client so we can work on this new client. What changed:

• Everything that was PT4-logic is now enclosed in #if USE_STEAM, if this pre-proc is not defined it will revert to PT5-compatible changes.
• Modified the models to switch to the new AccountLogin structure.
• Changed all PlayerInfo tracking to AccountID instead of SteamID
• The PacketManager now logs the incoming and outgoing packets enums (this is a temporary change).
• The account must be manually created in your database, the Password is currently in clear-text (plan to change)