AliEveEventManager

AliEveEventManager
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Implement management of dependent event-managers and their invocation
when moving to a next event.

embed_init.C
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New macro showing how to run event-emedding visualization.

display.C, alieve_init.C, visscan_init.C
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CINT has problems when converting "raw-strings" to const TString&
arguments. Make dummy TString variables for the time being (reported
to Axel).