Generalize build_cube(..., gauss_lobatto_grid=true)
Generalize build_cube(..., gauss_lobatto_grid=true)

* Add GaussLobattoRedistributionFunction class.
* Call MeshTools::Modification::redistribute() instead of adding nodes
  in a different way depending on the flag.
* Saves a few lines of code overall, and is a first step towards
  possibly generalizing build_cube() even further to allow it to take
  a user-supplied redistribution function.

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