Allow to see rooms of incompatible versions in the lobby For the new clients the room version is shown in a separate column. There is also a hack for previous versions clients: the room vesion specifier is prepended to the room names for rooms of incompatible versions, and the server shows 'incompatible version' error if the client tries to join them.

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Lua scripts for engine testing. These scripts are the same as other Lua scripts

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in Hedgewars, but you ought to call `EndLuaTest(TEST_SUCCESSFUL)` or

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`EndLuaTest(TEST_FAILED)` when the test is completed.