Add MultiLap support for MP4 & Turbo

[TigerGorilla2]

Changes:

• TmTurbo: add MultiLap support
• MP4: add MultiLap support
• All: Bump splits-file version to 2
  • TmNext: Nothing changes
  • TmTurbo & MP4: Indicates that the splits-file is correct for MultiLap maps

Note: I have upgraded the splits-file version to 2. The only difference to v1 is the meaning in MP4 & Turbo contexts to indicate that it supports MultiLaps. When you load a MultiLap map in MP4 & TmTurbo with an old (version < 2) splits-file it will be deleted! Reasoning is that it only contains splits for one lap is therefore useless.

[RuurdBijlsma]

nice