Replace SerialMesh elem and node iterator accessor functions with macros.
Replace SerialMesh elem and node iterator accessor functions with macros.

* The macros use __VAR_ARGS__ to pass an arbitrary number of arguments
  to the Predicate constructor. Note that you must pass at least one
  argument for "...", otherwise you get a warning.  This is our first
  use of __VAR_ARGS__ in the library.  I think it is pretty standard,
  but I'm not sure if it is part of *the* standard.

* Also found and fixed a bug in which the "not_ancestor" accessors used
  the "Ancestor" predictate instead of the "NotAncestor" predicate.

vikramvgarg/libmesh,cahaynes/libmesh,svallaghe/libmesh,aeslaughter/libmesh,benkirk/libmesh,jwpeterson/libmesh,cahaynes/libmesh,vikramvgarg/libmesh,libMesh/libmesh,vikramvgarg/libmesh,dmcdougall/libmesh,jwpeterson/libmesh,hrittich/libmesh,cahaynes/libmesh,roystgnr/libmesh,hrittich/libmesh,benkirk/libmesh,BalticPinguin/libmesh,coreymbryant/libmesh,benkirk/libmesh,pbauman/libmesh,coreymbryant/libmesh,jiangwen84/libmesh,libMesh/libmesh,aeslaughter/libmesh,jiangwen84/libmesh,permcody/libmesh,dschwen/libmesh,jwpeterson/libmesh,libMesh/libmesh,jiangwen84/libmesh,dknez/libmesh,friedmud/libmesh,dmcdougall/libmesh,giorgiobornia/libmesh,balborian/libmesh,hrittich/libmesh,jwpeterson/libmesh,pbauman/libmesh,BalticPinguin/libmesh,capitalaslash/libmesh,permcody/libmesh,capitalaslash/libmesh,balborian/libmesh,svallaghe/libmesh,pbauman/libmesh,90jrong/libmesh,aeslaughter/libmesh,balborian/libmesh,dknez/libmesh,benkirk/libmesh,pbauman/libmesh,dknez/libmesh,friedmud/libmesh,friedmud/libmesh,giorgiobornia/libmesh,jwpeterson/libmesh,libMesh/libmesh,BalticPinguin/libmesh,cahaynes/libmesh,friedmud/libmesh,pbauman/libmesh,BalticPinguin/libmesh,svallaghe/libmesh,pbauman/libmesh,hrittich/libmesh,friedmud/libmesh,roystgnr/libmesh,capitalaslash/libmesh,svallaghe/libmesh,giorgiobornia/libmesh,coreymbryant/libmesh,hrittich/libmesh,svallaghe/libmesh,90jrong/libmesh,jwpeterson/libmesh,hrittich/libmesh,dschwen/libmesh,vikramvgarg/libmesh,dschwen/libmesh,libMesh/libmesh,capitalaslash/libmesh,aeslaughter/libmesh,permcody/libmesh,dschwen/libmesh,dmcdougall/libmesh,hrittich/libmesh,libMesh/libmesh,hrittich/libmesh,BalticPinguin/libmesh,90jrong/libmesh,jwpeterson/libmesh,dknez/libmesh,roystgnr/libmesh,friedmud/libmesh,vikramvgarg/libmesh,BalticPinguin/libmesh,hrittich/libmesh,permcody/libmesh,coreymbryant/libmesh,benkirk/libmesh,vikramvgarg/libmesh,jiangwen84/libmesh,90jrong/libmesh,benkirk/libmesh,cahaynes/libmesh,90jrong/libmesh,benkirk/libmesh,balborian/libmesh,permcody/libmesh,aeslaughter/libmesh,90jrong/libmesh,coreymbryant/libmesh,dmcdougall/libmesh,giorgiobornia/libmesh,giorgiobornia/libmesh,dmcdougall/libmesh,roystgnr/libmesh,roystgnr/libmesh,balborian/libmesh,dknez/libmesh,pbauman/libmesh,dschwen/libmesh,permcody/libmesh,vikramvgarg/libmesh,jiangwen84/libmesh,aeslaughter/libmesh,jwpeterson/libmesh,benkirk/libmesh,balborian/libmesh,dschwen/libmesh,coreymbryant/libmesh,capitalaslash/libmesh,aeslaughter/libmesh,90jrong/libmesh,friedmud/libmesh,giorgiobornia/libmesh,90jrong/libmesh,balborian/libmesh,vikramvgarg/libmesh,dschwen/libmesh,coreymbryant/libmesh,jiangwen84/libmesh,svallaghe/libmesh,dknez/libmesh,svallaghe/libmesh,BalticPinguin/libmesh,dknez/libmesh,dmcdougall/libmesh,giorgiobornia/libmesh,roystgnr/libmesh,roystgnr/libmesh,permcody/libmesh,cahaynes/libmesh,balborian/libmesh,jiangwen84/libmesh,BalticPinguin/libmesh,giorgiobornia/libmesh,capitalaslash/libmesh,svallaghe/libmesh,90jrong/libmesh,libMesh/libmesh,permcody/libmesh,dknez/libmesh,dmcdougall/libmesh,libMesh/libmesh,pbauman/libmesh,giorgiobornia/libmesh,pbauman/libmesh,capitalaslash/libmesh,dschwen/libmesh,balborian/libmesh,friedmud/libmesh,roystgnr/libmesh,aeslaughter/libmesh,vikramvgarg/libmesh,balborian/libmesh,cahaynes/libmesh,jiangwen84/libmesh,benkirk/libmesh,svallaghe/libmesh,aeslaughter/libmesh,friedmud/libmesh,cahaynes/libmesh,capitalaslash/libmesh,dmcdougall/libmesh,coreymbryant/libmesh