Challenge-V_538, Challenge-V_539 and Sokoban-II_1576 have been modified

[LaserDucky]

============= TO ALL =============
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To get rid of shortcuts, the following levels have been modified
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Challenge-V_0538
Crystal Block at B9
Water at G6, H6 and K6
Solid Block at I7 and J7
(MOD: 1)
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Challenge-V_0539
Water at K14
TankMovers at F10 to F15
(MOD: 1)
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Sokoban-II_1576
Reversed the moving direction of H3 TankMover
(MOD: 1)
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Donald
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*********** WARNING for USERS of LTUpdate.exe PROGRAM. ***********
Running the LaserTank Update: Levels, High Scores and Playback Files program (LTUpdate.exe) on the next monthly update will delete your High Score(s) (if any) for this (these) level(s). To avoid losing this (these) High Score(s), you should record your solution(s) and save the Playback file(s) to a temporary folder. After you run the LTUpdate.exe program you can copy this (these) recording(s) [Playback file(s)] back to your LaserTank folder, and use it (them) to restore your High Score(s) for this (these) modified level(s).
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