RooAbsPdf:

 - add interface for querying built-in generator capabilities, similar
   to the analytic integral interface: getGenerator() & generateEvent()
 - rename tryIntegral() methods to matchArgs()/matchArgsByName() and fix
   problem with >1 proxy name in TList version (now matchArgsByName())
 - move attatchDataSet() method into RooAbsArg and change RooDataSet* arg to RooDataSet&
 - make RooAcceptReject a friend so it can use recursiveRedirectServers()

RooArgSet:

 - add a method remove(const RooArgSet&) that calls remove(const RooAbsArg&)
 - add removeAll() method
 - add replace(const RooArgSet&) method

RooAcceptReject:

 - implementation of general-purpose accept-reject generator, used by RooGenContext

RooAbsRealLValue,RooAbsCategoryLValue:

 - add non-virtual randomize() method for toy MC

RooAbsArg:

 - add printout of our memory address in verbose printToStream() for x-referencing
   with client/server addresses of other AbsArgs.

RooRealIntegral:

 - augment verbose printToStream() output

RooAbsCategory:

 - add protected getOrdinal() method

RooAbsCategoryLValue:

 - add protected setOrdinal() method


git-svn-id: http://root.cern.ch/svn/root/trunk@2345 27541ba8-7e3a-0410-8455-c3a389f83636